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  • CHAPTER XV – ENGLAND UNDER HENRY THE THIRD, CALLED, OF WINCHESTER
A Child's History of England

CHAPTER XV – ENGLAND UNDER HENRY THE THIRD, CALLED, OF WINCHESTER

Charles Dickens


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IF any of the English Barons remembered the murdered Arthur`s sister, Eleanor the fair maid of Brittany, shut up in her convent at Bristol, none among them spoke of her now, or maintained her right to the Crown. The dead Usurper`s eldest boy, HENRY by name, was taken by the Earl of Pembroke, the Marshal of England, to the city of Gloucester, and there crowned in great haste when he was only ten years old. As the Crown itself had been lost with the King`s treasure in the raging water, and as there was no time to make another, they put a circle of plain gold upon his head instead. `We have been the enemies of this child`s father,` said Lord Pembroke, a good and true gentleman, to the few Lords who were present, `and he merited our ill-will; but the child himself is innocent, and his youth demands our friendship and protection.` Those Lords felt tenderly towards the little boy, remembering their own young children; and they bowed their heads, and said, `Long live King Henry the Third!`

Next, a great council met at Bristol, revised Magna Charta, and made Lord Pembroke Regent or Protector of England, as the King was too young to reign alone. The next thing to be done, was to get rid of Prince Louis of France, and to win over those English Barons who were still ranged under his banner. He was strong in many parts of England, and in London itself; and he held, among other places, a certain Castle called the Castle of Mount Sorel, in Leicestershire. To this fortress, after some skirmishing and truce-making, Lord Pembroke laid siege. Louis despatched an army of six hundred knights and twenty thousand soldiers to relieve it. Lord Pembroke, who was not strong enough for such a force, retired with all his men. The army of the French Prince, which had marched there with fire and plunder, marched away with fire and plunder, and came, in a boastful swaggering manner, to Lincoln. The town submitted; but the Castle in the town, held by a brave widow lady, named NICHOLA DE CAMVILLE (whose property it was), made such a sturdy resistance, that the French Count in command of the army of the French Prince found it necessary to besiege this Castle. While he was thus engaged, word was brought to him that Lord Pembroke, with four hundred knights, two hundred and fifty men with crossbows, and a stout force both of horse and foot, was marching towards him. `What care I?` said the French Count. `The Englishman is not so mad as to attack me and my great army in a walled town!` But the Englishman did it for all that, and did it – not so madly but so wisely, that he decoyed the great army into the narrow, ill-paved lanes and byways of Lincoln, where its horsesoldiers could not ride in any strong body; and there he made such havoc with them, that the whole force surrendered themselves prisoners, except the Count; who said that he would never yield to any English traitor alive, and accordingly got killed. The end of this victory, which the English called, for a joke, the Fair of Lincoln, was the usual one in those times – the common men were slain without any mercy, and the knights and gentlemen paid ransom and went home.

The wife of Louis, the fair BLANCHE OF CASTILE, dutifully equipped a fleet of eighty good ships, and sent it over from France to her husband`s aid. An English fleet of forty ships, some good and some bad, gallantly met them near the mouth of the Thames, and took or sunk sixty-five in one fight. This great loss put an end to the French Prince`s hopes. A treaty was made at Lambeth, in virtue of which the English Barons who had remained attached to his cause returned to their allegiance, and it was engaged on both sides that the Prince and all his troops should retire peacefully to France. It was time to go; for war had made him so poor that he was obliged to borrow money from the citizens of London to pay his expenses home.

Lord Pembroke afterwards applied himself to governing the country justly, and to healing the quarrels and disturbances that had arisen among men in the days of the bad King John. He caused Magna Charta to be still more improved, and so amended the Forest Laws that a Peasant was no longer put to death for killing a stag in a Royal Forest, but was only imprisoned. It would have been well for England if it could have had so good a Protector many years longer, but that was not to be. Within three years after the young King`s Coronation, Lord Pembroke died; and you may see his tomb, at this day, in the old Temple Church in London.

The Protectorship was now divided. PETER DE ROCHES, whom King John had made Bishop of Winchester, was entrusted with the care of the person of the young sovereign; and the exercise of the Royal authority was confided to EARL HUBERT DE BURGH. These two personages had from the first no liking for each other, and soon became enemies. When the young King was declared of age, Peter de Roches, finding that Hubert increased in power and favour, retired discontentedly, and went abroad. For nearly ten years afterwards Hubert had full sway alone.

But ten years is a long time to hold the favour of a King. This King, too, as he grew up, showed a strong resemblance to his father, in feebleness, inconsistency, and irresolution. The best that can be said of him is that he was not cruel. De Roches coming home again, after ten years, and being a novelty, the King began to favour him and to look coldly on Hubert. Wanting money besides, and having made Hubert rich, he began to dislike Hubert. At last he was made to believe, or pretended to believe, that Hubert had misappropriated some of the Royal treasure; and ordered him to furnish an account of all he had done in his administration. Besides which, the foolish charge was brought against Hubert that he had made himself the King`s favourite by magic. Hubert very well knowing that he could never defend himself against such nonsense, and that his old enemy must be determined on his ruin, instead of answering the charges fled to Merton Abbey. Then the King, in a violent passion, sent for the Mayor of London, and said to the Mayor, `Take twenty thousand citizens, and drag me Hubert de Burgh out of that abbey, and bring him here.` The Mayor posted off to do it, but the Archbishop of Dublin (who was a friend of Hubert`s) warning the King that an abbey was a sacred place, and that if he committed any violence there, he must answer for it to the Church, the King changed his mind and called the Mayor back, and declared that Hubert should have four months to prepare his defence, and should be safe and free during that time.

Hubert, who relied upon the King`s word, though I think he was old enough to have known better, came out of Merton Abbey upon these conditions, and journeyed away to see his wife: a Scottish Princess who was then at St. Edmund`s-Bury.

Almost as soon as he had departed from the Sanctuary, his enemies persuaded the weak King to send out one SIR GODFREY DE CRANCUMB, who commanded three hundred vagabonds called the Black Band, with orders to seize him. They came up with him at a little town in Essex, called Brentwood, when he was in bed. He leaped out of bed, got out of the house, fled to the church, ran up to the altar, and laid his hand upon the cross. Sir Godfrey and the Black Band, caring neither for church, altar, nor cross, dragged him forth to the church door, with their drawn swords flashing round his head, and sent for a Smith to rivet a set of chains upon him. When the Smith (I wish I knew his name!) was brought, all dark and swarthy with the smoke of his forge, and panting with the speed he had made; and the Black Band, falling aside to show him the Prisoner, cried with a loud uproar, `Make the fetters heavy! make them strong!` the Smith dropped upon his knee – but not to the Black Band – and said, `This is the brave Earl Hubert de Burgh, who fought at Dover Castle, and destroyed the French fleet, and has done his country much good service. You may kill me, if you like, but I will never make a chain for Earl Hubert de Burgh!`

The Black Band never blushed, or they might have blushed at this. They knocked the Smith about from one to another, and swore at him, and tied the Earl on horseback, undressed as he was, and carried him off to the Tower of London. The Bishops, however, were so indignant at the violation of the Sanctuary of the Church, that the frightened King soon ordered the Black Band to take him back again; at the same time commanding the Sheriff of Essex to prevent his escaping out of Brentwood Church. Well! the Sheriff dug a deep trench all round the church, and erected a high fence, and watched the church night and day; the Black Band and their Captain watched it too, like three hundred and one black wolves. For thirty-nine days, Hubert de Burgh remained within. At length, upon the fortieth day, cold and hunger were too much for him, and he gave himself up to the Black Band, who carried him off, for the second time, to the Tower. When his trial came on, he refused to plead; but at last it was arranged that he should give up all the royal lands which had been bestowed upon him, and should be kept at the Castle of Devizes, in what was called `free prison,` in charge of four knights appointed by four lords. There, he remained almost a year, until, learning that a follower of his old enemy the Bishop was made Keeper of the Castle, and fearing that he might be killed by treachery, he climbed the ramparts one dark night, dropped from the top of the high Castle wall into the moat, and coming safely to the ground, took refuge in another church. From this place he was delivered by a party of horse despatched to his help by some nobles, who were by this time in revolt against the King, and assembled in Wales. He was finally pardoned and restored to his estates, but he lived privately, and never more aspired to a high post in the realm, or to a high place in the King`s favour. And thus end – more happily than the stories of many favourites of Kings – the adventures of Earl Hubert de Burgh.

The nobles, who had risen in revolt, were stirred up to rebellion by the overbearing conduct of the Bishop of Winchester, who, finding that the King secretly hated the Great Charter which had been forced from his father, did his utmost to confirm him in that dislike, and in the preference he showed to foreigners over the English. Of this, and of his even publicly declaring that the Barons of England were inferior to those of France, the English Lords complained with such bitterness, that the King, finding them well supported by the clergy, became frightened for his throne, and sent away the Bishop and all his foreign associates. On his marriage, however, with ELEANOR, a French lady, the daughter of the Count of Provence, he openly favoured the foreigners again; and so many of his wife`s relations came over, and made such an immense family-party at court, and got so many good things, and pocketed so much money, and were so high with the English whose money they pocketed, that the bolder English Barons murmured openly about a clause there was in the Great Charter, which provided for the banishment of unreasonable favourites. But, the foreigners only laughed disdainfully, and said, `What are your English laws to us?`

King Philip of France had died, and had been succeeded by Prince Louis, who had also died after a short reign of three years, and had been succeeded by his son of the same name – so moderate and just a man that he was not the least in the world like a King, as Kings went. ISABELLA, King Henry`s mother, wished very much (for a certain spite she had) that England should make war against this King; and, as King Henry was a mere puppet in anybody`s hands who knew how to manage his feebleness, she easily carried her point with him. But, the Parliament were determined to give him no money for such a war. So, to defy the Parliament, he packed up thirty large casks of silver – I don`t know how he got so much; I dare say he screwed it out of the miserable Jews – and put them aboard ship, and went away himself to carry war into France: accompanied by his mother and his brother Richard, Earl of Cornwall, who was rich and clever. But he only got well beaten, and came home.

The good-humour of the Parliament was not restored by this. They reproached the King with wasting the public money to make greedy foreigners rich, and were so stern with him, and so determined not to let him have more of it to waste if they could help it, that he was at his wit`s end for some, and tried so shamelessly to get all he could from his subjects, by excuses or by force, that the people used to say the King was the sturdiest beggar in England. He took the Cross, thinking to get some money by that means; but, as it was very well known that he never meant to go on a crusade, he got none. In all this contention, the Londoners were particularly keen against the King, and the King hated them warmly in return. Hating or loving, however, made no difference; he continued in the same condition for nine or ten years, when at last the Barons said that if he would solemnly confirm their liberties afresh, the Parliament would vote him a large sum.

As he readily consented, there was a great meeting held in Westminster Hall, one pleasant day in May, when all the clergy, dressed in their robes and holding every one of them a burning candle in his hand, stood up (the Barons being also there) while the Archbishop of Canterbury read the sentence of excommunication against any man, and all men, who should henceforth, in any way, infringe the Great Charter of the Kingdom. When he had done, they all put out their burning candles with a curse upon the soul of any one, and every one, who should merit that sentence. The King concluded with an oath to keep the Charter, `As I am a man, as I am a Christian, as I am a Knight, as I am a King!`

It was easy to make oaths, and easy to break them; and the King did both, as his father had done before him. He took to his old courses again when he was supplied with money, and soon cured of their weakness the few who had ever really trusted him. When his money was gone, and he was once more borrowing and begging everywhere with a meanness worthy of his nature, he got into a difficulty with the Pope respecting the Crown of Sicily, which the Pope said he had a right to give away, and which he offered to King Henry for his second son, PRINCE EDMUND. But, if you or I give away what we have not got, and what belongs to somebody else, it is likely that the person to whom we give it, will have some trouble in taking it. It was exactly so in this case. It was necessary to conquer the Sicilian Crown before it could be put upon young Edmund`s head. It could not be conquered without money. The Pope ordered the clergy to raise money. The clergy, however, were not so obedient to him as usual; they had been disputing with him for some time about his unjust preference of Italian Priests in England; and they had begun to doubt whether the King`s chaplain, whom he allowed to be paid for preaching in seven hundred churches, could possibly be, even by the Pope`s favour, in seven hundred places at once. `The Pope and the King together,` said the Bishop of London, `may take the mitre off my head; but, if they do, they will find that I shall put on a soldier`s helmet. I pay nothing.` The Bishop of Worcester was as bold as the Bishop of London, and would pay nothing either. Such sums as the more timid or more helpless of the clergy did raise were squandered away, without doing any good to the King, or bringing the Sicilian Crown an inch nearer to Prince Edmund`s head. The end of the business was, that the Pope gave the Crown to the brother of the King of France (who conquered it for himself), and sent the King of England in, a bill of one hundred thousand pounds for the expenses of not having won it.

The King was now so much distressed that we might almost pity him, if it were possible to pity a King so shabby and ridiculous. His clever brother, Richard, had bought the title of King of the Romans from the German people, and was no longer near him, to help him with advice. The clergy, resisting the very Pope, were in alliance with the Barons. The Barons were headed by SIMON DE MONTFORT, Earl of Leicester, married to King Henry`s sister, and, though a foreigner himself, the most popular man in England against the foreign favourites. When the King next met his Parliament, the Barons, led by this Earl, came before him, armed from head to foot, and cased in armour. When the Parliament again assembled, in a month`s time, at Oxford, this Earl was at their head, and the King was obliged to consent, on oath, to what was called a Committee of Government: consisting of twenty-four members: twelve chosen by the Barons, and twelve chosen by himself.

But, at a good time for him, his brother Richard came back. Richard`s first act (the Barons would not admit him into England on other terms) was to swear to be faithful to the Committee of Government – which he immediately began to oppose with all his might. Then, the Barons began to quarrel among themselves; especially the proud Earl of Gloucester with the Earl of Leicester, who went abroad in disgust. Then, the people began to be dissatisfied with the Barons, because they did not do enough for them. The King`s chances seemed so good again at length, that he took heart enough – or caught it from his brother – to tell the Committee of Government that he abolished them – as to his oath, never mind that, the Pope said! – and to seize all the money in the Mint, and to shut himself up in the Tower of London. Here he was joined by his eldest son, Prince Edward; and, from the Tower, he made public a letter of the Pope`s to the world in general, informing all men that he had been an excellent and just King for five-and-forty years.

As everybody knew he had been nothing of the sort, nobody cared much for this document. It so chanced that the proud Earl of Gloucester dying, was succeeded by his son; and that his son, instead of being the enemy of the Earl of Leicester, was (for the time) his friend. It fell out, therefore, that these two Earls joined their forces, took several of the Royal Castles in the country, and advanced as hard as they could on London. The London people, always opposed to the King, declared for them with great joy. The King himself remained shut up, not at all gloriously, in the Tower. Prince Edward made the best of his way to Windsor Castle. His mother, the Queen, attempted to follow him by water; but, the people seeing her barge rowing up the river, and hating her with all their hearts, ran to London Bridge, got together a quantity of stones and mud, and pelted the barge as it came through, crying furiously, `Drown the Witch! Drown her!` They were so near doing it, that the Mayor took the old lady under his protection, and shut her up in St. Paul`s until the danger was past.

It would require a great deal of writing on my part, and a great deal of reading on yours, to follow the King through his disputes with the Barons, and to follow the Barons through their disputes with one another – so I will make short work of it for both of us, and only relate the chief events that arose out of these quarrels. The good King of France was asked to decide between them. He gave it as his opinion that the King must maintain the Great Charter, and that the Barons must give up the Committee of Government, and all the rest that had been done by the Parliament at Oxford: which the Royalists, or King`s party, scornfully called the Mad Parliament. The Barons declared that these were not fair terms, and they would not accept them. Then they caused the great bell of St. Paul`s to be tolled, for the purpose of rousing up the London people, who armed themselves at the dismal sound and formed quite an army in the streets. I am sorry to say, however, that instead of falling upon the King`s party with whom their quarrel was, they fell upon the miserable Jews, and killed at least five hundred of them. They pretended that some of these Jews were on the King`s side, and that they kept hidden in their houses, for the destruction of the people, a certain terrible composition called Greek Fire, which could not be put out with water, but only burnt the fiercer for it. What they really did keep in their houses was money; and this their cruel enemies wanted, and this their cruel enemies took, like robbers and murderers.

The Earl of Leicester put himself at the head of these Londoners and other forces, and followed the King to Lewes in Sussex, where he lay encamped with his army. Before giving the King`s forces battle here, the Earl addressed his soldiers, and said that King Henry the Third had broken so many oaths, that he had become the enemy of God, and therefore they would wear white crosses on their breasts, as if they were arrayed, not against a fellow-Christian, but against a Turk. White-crossed accordingly, they rushed into the fight. They would have lost the day – the King having on his side all the foreigners in England: and, from Scotland, JOHN COMYN, JOHN BALIOL, and ROBERT BRUCE, with all their men – but for the impatience of PRINCE EDWARD, who, in his hot desire to have vengeance on the people of London, threw the whole of his father`s army into confusion. He was taken Prisoner; so was the King; so was the King`s brother the King of the Romans; and five thousand Englishmen were left dead upon the bloody grass.

For this success, the Pope excommunicated the Earl of Leicester: which neither the Earl nor the people cared at all about. The people loved him and supported him, and he became the real King; having all the power of the government in his own hands, though he was outwardly respectful to King Henry the Third, whom he took with him wherever he went, like a poor old limp court-card. He summoned a Parliament (in the year one thousand two hundred and sixty-five) which was the first Parliament in England that the people had any real share in electing; and he grew more and more in favour with the people every day, and they stood by him in whatever he did.

Many of the other Barons, and particularly the Earl of Gloucester, who had become by this time as proud as his father, grew jealous of this powerful and popular Earl, who was proud too, and began to conspire against him. Since the battle of Lewes, Prince Edward had been kept as a hostage, and, though he was otherwise treated like a Prince, had never been allowed to go out without attendants appointed by the Earl of Leicester, who watched him. The conspiring Lords found means to propose to him, in secret, that they should assist him to escape, and should make him their leader; to which he very heartily consented.

So, on a day that was agreed upon, he said to his attendants after dinner (being then at Hereford), `I should like to ride on horseback, this fine afternoon, a little way into the country.` As they, too, thought it would be very pleasant to have a canter in the sunshine, they all rode out of the town together in a gay little troop. When they came to a fine level piece of turf, the Prince fell to comparing their horses one with another, and offering bets that one was faster than another; and the attendants, suspecting no harm, rode galloping matches until their horses were quite tired. The Prince rode no matches himself, but looked on from his saddle, and staked his money. Thus they passed the whole merry afternoon. Now, the sun was setting, and they were all going slowly up a hill, the Prince`s horse very fresh and all the other horses very weary, when a strange rider mounted on a grey steed appeared at the top of the hill, and waved his hat. `What does the fellow mean?` said the attendants one to another. The Prince answered on the instant by setting spurs to his horse, dashing away at his utmost speed, joining the man, riding into the midst of a little crowd of horsemen who were then seen waiting under some trees, and who closed around him; and so he departed in a cloud of dust, leaving the road empty of all but the baffled attendants, who sat looking at one another, while their horses drooped their ears and panted.

The Prince joined the Earl of Gloucester at Ludlow. The Earl of Leicester, with a part of the army and the stupid old King, was at Hereford. One of the Earl of Leicester`s sons, Simon de Montfort, with another part of the army, was in Sussex. To prevent these two parts from uniting was the Prince`s first object. He attacked Simon de Montfort by night, defeated him, seized his banners and treasure, and forced him into Kenilworth Castle in Warwickshire, which belonged to his family.

His father, the Earl of Leicester, in the meanwhile, not knowing what had happened, marched out of Hereford, with his part of the army and the King, to meet him. He came, on a bright morning in August, to Evesham, which is watered by the pleasant river Avon. Looking rather anxiously across the prospect towards Kenilworth, he saw his own banners advancing; and his face brightened with joy. But, it clouded darkly when he presently perceived that the banners were captured, and in the enemy`s hands; and he said, `It is over. The Lord have mercy on our souls, for our bodies are Prince Edward`s!`

He fought like a true Knight, nevertheless. When his horse was killed under him, he fought on foot. It was a fierce battle, and the dead lay in heaps everywhere. The old King, stuck up in a suit of armour on a big war-horse, which didn`t mind him at all, and which carried him into all sorts of places where he didn`t want to go, got into everybody`s way, and very nearly got knocked on the head by one of his son`s men. But he managed to pipe out, `I am Harry of Winchester!` and the Prince, who heard him, seized his bridle, and took him out of peril. The Earl of Leicester still fought bravely, until his best son Henry was killed, and the bodies of his best friends choked his path; and then he fell, still fighting, sword in hand. They mangled his body, and sent it as a present to a noble lady – but a very unpleasant lady, I should think – who was the wife of his worst enemy. They could not mangle his memory in the minds of the faithful people, though. Many years afterwards, they loved him more than ever, and regarded him as a Saint, and always spoke of him as `Sir Simon the Righteous.`

And even though he was dead, the cause for which he had fought still lived, and was strong, and forced itself upon the King in the very hour of victory. Henry found himself obliged to respect the Great Charter, however much he hated it, and to make laws similar to the laws of the Great Earl of Leicester, and to be moderate and forgiving towards the people at last – even towards the people of London, who had so long opposed him. There were more risings before all this was done, but they were set at rest by these means, and Prince Edward did his best in all things to restore peace. One Sir Adam de Gourdon was the last dissatisfied knight in arms; but, the Prince vanquished him in single combat, in a wood, and nobly gave him his life, and became his friend, instead of slaying him. Sir Adam was not ungrateful. He ever afterwards remained devoted to his generous conqueror.

When the troubles of the Kingdom were thus calmed, Prince Edward and his cousin Henry took the Cross, and went away to the Holy Land, with many English Lords and Knights. Four years afterwards the King of the Romans died, and, next year (one thousand two hundred and seventy-two), his brother the weak King of England died. He was sixty-eight years old then, and had reigned fifty-six years. He was as much of a King in death, as he had ever been in life. He was the mere pale shadow of a King at all times.

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Periodic Table

Hydrogen

Discovered State
1766 Gas
Atomic Mass Density
1.008 0.08988 g/L
1 1 H 2
Electrons Protons Neutrons
1 1 0
Electronic Configuration
1s1
  • Discovered By: Henry Cavendish
  • Appearance: colorless gas
  • Category: diatomic nonmetal
  • Melting Point: 13.99 K
  • Boiling Point: 20.271 K
  • Ox. State: -1, 1
  • Bonding Type: diatomic
  • Electronegativity: 2.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.

Helium

Discovered State
1895 Gas
Atomic Mass Density
4.0026022 0.1786 g/L
4 2 He
Electrons Protons Neutrons
2 2 2
Electronic Configuration
1s2
  • Discovered By: Pierre Janssen
  • Appearance: colorless gas
  • Category: noble gas
  • Melting Point: 0.95 K
  • Boiling Point: 4.222 K
  • Ox. State:
  • Bonding Type: atomic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among all the elements.

Lithium

Discovered State
1817 Solid
Atomic Mass Density
6.94 0.534 g/L
7 3 Li
Electrons Protons Neutrons
3 3 4
Electronic Configuration
[He] 2s1
  • Discovered By: Johan August Arfwedson
  • Appearance: silvery-white
  • Category: alkali metal
  • Melting Point: 453.65 K
  • Boiling Point: 1615 K
  • Ox. State: 1
  • Bonding Type: metallic
  • Electronegativity: 0.98
  • Wiki Link: Source Link
  • Element Image: Image Link

Lithium (from Greek:λίθος lithos, "stone") is a chemical element with the symbol Li and atomic number 3. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element.

Beryllium

Discovered State
1798 Solid
Atomic Mass Density
9.01218315 1.848 g/L
9 4 Be
Electrons Protons Neutrons
4 4 5
Electronic Configuration
[He] 2s2
  • Discovered By: Louis Nicolas Vauquelin
  • Appearance: white-gray
  • Category: alkaline earth metal
  • Melting Point: 1560 K
  • Boiling Point: 2743 K
  • Ox. State: 2
  • Bonding Type: metallic
  • Electronegativity: 1.57
  • Wiki Link: Source Link
  • Element Image: Image Link

Beryllium is a chemical element with symbol Be and atomic number 4. It is created through stellar nucleosynthesis and is a relatively rare element in the universe. It is a divalent element which occurs naturally only in combination with other elements in minerals.

Boron

Discovered State
1807 Solid
Atomic Mass Density
10.81 2.46 g/L
10 5 B
Electrons Protons Neutrons
5 5 5
Electronic Configuration
[He] 2s22p1
  • Discovered By: Joseph Louis Gay-Lussac
  • Appearance: black-brown
  • Category: metalloid
  • Melting Point: 2348 K
  • Boiling Point: 4273 K
  • Ox. State: 1, 2, 3
  • Bonding Type: covalent network
  • Electronegativity: 2.04
  • Wiki Link: Source Link
  • Element Image: Image Link

Boron is a metalloid chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in both the Solar system and the Earth's crust. Boron is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals.

Carbon

Discovered State
Ancient Solid
Atomic Mass Density
12.011 2.26 g/L
12 6 C
Electrons Protons Neutrons
6 6 6
Electronic Configuration
[He] 2s22p2
  • Discovered By: Ancient Egypt
  • Appearance: black
  • Category: polyatomic nonmetal
  • Melting Point: 3823 K
  • Boiling Point: 4300 K
  • Ox. State: -4, -3, -2, -1, 1, 2, 3, 4
  • Bonding Type: covalent network
  • Electronegativity: 2.55
  • Wiki Link: Source Link
  • Element Image: Image Link

Carbon (from Latin:carbo "coal") is a chemical element with symbol C and atomic number 6. On the periodic table, it is the first (row 2) of six elements in column (group) 14, which have in common the composition of their outer electron shell. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.

Nitrogen

Discovered State
1772 Gas
Atomic Mass Density
14.0067 0.001251 g/L
14 7 N 2
Electrons Protons Neutrons
7 7 7
Electronic Configuration
[He] 2s22p3
  • Discovered By: Daniel Rutherford
  • Appearance: colorless gas
  • Category: diatomic nonmetal
  • Melting Point: 63 K
  • Boiling Point: 77 K
  • Ox. State: -3, -2, -1, 1, 2, 3, 4, 5
  • Bonding Type: diatomic
  • Electronegativity: 3.04
  • Wiki Link: Source Link
  • Element Image: Image Link

Nitrogen is a chemical element with symbol N and atomic number 7. It is the lightest pnictogen and at room temperature, it is a transparent, odorless diatomic gas. Nitrogen is a common element in the universe, estimated at about seventh in total abundance in the Milky Way and the Solar System.

Oxygen

Discovered State
1774 Gas
Atomic Mass Density
15.9994 1.429 g/L
16 8 O 2
Electrons Protons Neutrons
8 8 8
Electronic Configuration
[He] 2s22p4
  • Discovered By: Carl Wilhelm Scheele
  • Appearance: colorless gas
  • Category: diatomic nonmetal
  • Melting Point: 54.36 K
  • Boiling Point: 90.188 K
  • Ox. State: -2, -1, 1, 2
  • Bonding Type: diatomic
  • Electronegativity: 3.44
  • Wiki Link: Source Link
  • Element Image: Image Link

Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms compounds (notably oxides) with most elements. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.

Fluorine

Discovered State
1670 Gas
Atomic Mass Density
18.998 1.696 g/L
19 9 F
Electrons Protons Neutrons
9 9 10
Electronic Configuration
[He] 2s22p5
  • Discovered By: André-Marie Ampère
  • Appearance:
  • Category: diatomic nonmetal
  • Melting Point: 53.48 K
  • Boiling Point: 85.03 K
  • Ox. State: -1
  • Bonding Type: atomic
  • Electronegativity: 3.98
  • Wiki Link: Source Link
  • Element Image: Image Link

Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive:almost all other elements, including some noble gases, form compounds with fluorine.

Neon

Discovered State
1898 Gas
Atomic Mass Density
20.17976 0.9002 g/L
20 10 Ne
Electrons Protons Neutrons
10 10 10
Electronic Configuration
[He] 2s22p6
  • Discovered By: Morris Travers
  • Appearance: colorless gas
  • Category: noble gas
  • Melting Point: 24.56 K
  • Boiling Point: 27.104 K
  • Ox. State:
  • Bonding Type: atomic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Neon is a chemical element with symbol Ne and atomic number 10. It is in group 18 (noble gases) of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.

Sodium

Discovered State
1807 solid
Atomic Mass Density
22.989 0.968 g/L
23 11 Na
Electrons Protons Neutrons
11 11 12
Electronic Configuration
[Ne] 3s1
  • Discovered By: Humphry Davy
  • Appearance: silvery white metallic
  • Category: alkali metal
  • Melting Point: 370.944 K
  • Boiling Point: 1156.09 K
  • Ox. State: -1, 1
  • Bonding Type: metallic
  • Electronegativity: 0.93
  • Wiki Link: Source Link
  • Element Image: Image Link

Sodium /ˈsoʊdiəm/ is a chemical element with symbol Na (from Ancient Greek Νάτριο) and atomic number 11. It is a soft, silver-white, highly reactive metal. In the Periodic table it is in column 1 (alkali metals), and shares with the other six elements in that column that it has a single electron in its outer shell, which it readily donates, creating a positively charged atom - a cation.

Magnesium

Discovered State
1808 solid
Atomic Mass Density
24.305 1.738 g/L
24 12 Mg
Electrons Protons Neutrons
12 12 12
Electronic Configuration
[Ne] 3s2
  • Discovered By: Joseph Black
  • Appearance: shiny grey solid
  • Category: alkaline earth metal
  • Melting Point: 923 K
  • Boiling Point: 1363 K
  • Ox. State: 1, 2
  • Bonding Type: metallic
  • Electronegativity: 1.31
  • Wiki Link: Source Link
  • Element Image: Image Link

Magnesium is a chemical element with symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (Group 2, or alkaline earth metals) of the periodic table:they each have the same electron configuration in their outer electron shell producing a similar crystal structure. Magnesium is the ninth most abundant element in the universe.

Aluminium

Discovered State
Ancient solid
Atomic Mass Density
26.98153857 2.7 g/L
27 13 Al
Electrons Protons Neutrons
13 13 14
Electronic Configuration
[Ne] 3s23p1
  • Discovered By: Humphry Davy
  • Appearance: silvery gray metallic
  • Category: post-transition metal
  • Melting Point: 933.47 K
  • Boiling Point: 2743 K
  • Ox. State: 1, 3
  • Bonding Type: metallic
  • Electronegativity: 1.61
  • Wiki Link: Source Link
  • Element Image: Image Link

Aluminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal, in the Earth's crust.

Silicon

Discovered State
1854 solid
Atomic Mass Density
28.085 2.329 g/L
28 14 Si
Electrons Protons Neutrons
14 14 14
Electronic Configuration
[Ne] 3s23p2
  • Discovered By: Jöns Jacob Berzelius
  • Appearance: crystalline
  • Category: metalloid
  • Melting Point: 1687 K
  • Boiling Point: 3538 K
  • Ox. State: -4, -3, -2, -1, 1, 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.9
  • Wiki Link: Source Link
  • Element Image: Image Link

Silicon is a chemical element with symbol Si and atomic number 14. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table. Controversy about silicon's character dates to its discovery.

Phosphorus

Discovered State
1669 solid
Atomic Mass Density
30.9737619985 1.823 g/L
31 15 P
Electrons Protons Neutrons
15 15 16
Electronic Configuration
[Ne] 3s23p3
  • Discovered By: Hennig Brand
  • Appearance: colourless
  • Category: polyatomic nonmetal
  • Melting Point: 317 K
  • Boiling Point: 554 K
  • Ox. State: -3, -2, -1, 1, 2, 3, 4, 5
  • Bonding Type: covalent network
  • Electronegativity: 2.19
  • Wiki Link: Source Link
  • Element Image: Image Link

Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but due to its high reactivity, phosphorus is never found as a free element on Earth. Instead phosphorus-containing minerals are almost always present in their maximally oxidised state, as inorganic phosphate rocks.

Sulfur

Discovered State
Ancient solid
Atomic Mass Density
32.06 2.07 g/L
32 16 S
Electrons Protons Neutrons
16 16 16
Electronic Configuration
[Ne] 3s23p4
  • Discovered By: Ancient china
  • Appearance: lemon yellow
  • Category: polyatomic nonmetal
  • Melting Point: 388.36 K
  • Boiling Point: 717.8 K
  • Ox. State: -2, -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: covalent network
  • Electronegativity: 2.58
  • Wiki Link: Source Link
  • Element Image: Image Link

Sulfur or sulphur (see spelling differences) is a chemical element with symbol S and atomic number 16. It is an abundant, multivalent non-metal. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S8.

Chlorine

Discovered State
1774 Gas
Atomic Mass Density
35.45 3.2 g/L
35 17 Cl
Electrons Protons Neutrons
17 17 18
Electronic Configuration
[Ne] 3s23p5
  • Discovered By: Carl Wilhelm Scheele
  • Appearance: pale yellow-green gas
  • Category: diatomic nonmetal
  • Melting Point: 171.6 K
  • Boiling Point: 239.11 K
  • Ox. State: -1, 1, 2, 3, 4, 5, 6, 7
  • Bonding Type: covalent network
  • Electronegativity: 3.16
  • Wiki Link: Source Link
  • Element Image: Image Link

Chlorine is a chemical element with symbol Cl and atomic number 17. It also has a relative atomic mass of 35.5. Chlorine is in the halogen group (17) and is the second lightest halogen following fluorine.

Argon

Discovered State
1894 Gas
Atomic Mass Density
39.9481 1.784 g/L
40 18 Ar
Electrons Protons Neutrons
18 18 22
Electronic Configuration
[Ne] 3s23p6
  • Discovered By: Lord Rayleigh
  • Appearance: colorless gas
  • Category: noble gas
  • Melting Point: 83.81 K
  • Boiling Point: 87.302 K
  • Ox. State:
  • Bonding Type: atomic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most common gas in the Earth's atmosphere, at 0.934% (9,340 ppmv), making it over twice as abundant as the next most common atmospheric gas, water vapor (which averages about 4000 ppmv, but varies greatly), and 23 times as abundant as the next most common non-condensing atmospheric gas, carbon dioxide (400 ppmv), and more than 500 times as abundant as the next most common noble gas, neon (18 ppmv).

Potassium

Discovered State
1807 Solid
Atomic Mass Density
39.09831 0.862 g/L
39 19 K
Electrons Protons Neutrons
19 19 20
Electronic Configuration
[Ar] 4s1
  • Discovered By: Humphry Davy
  • Appearance: silvery gray
  • Category: alkali metal
  • Melting Point: 336.7 K
  • Boiling Point: 1032 K
  • Ox. State: 1
  • Bonding Type: metallic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Potassium is a chemical element with symbol K (derived from Neo-Latin, kalium) and atomic number 19. It was first isolated from potash, the ashes of plants, from which its name is derived. In the Periodic table, potassium is one of seven elements in column (group) 1 (alkali metals):they all have a single valence electron in their outer electron shell, which they readily give up to create an atom with a positive charge - a cation, and combine with anions to form salts.

Calcium

Discovered State
1808 Solid
Atomic Mass Density
40.0784 1.55 g/L
40 20 Ca
Electrons Protons Neutrons
20 20 20
Electronic Configuration
[Ar] 4s2
  • Discovered By: Humphry Davy
  • Appearance:
  • Category: alkaline earth metal
  • Melting Point: 1115 K
  • Boiling Point: 1757 K
  • Ox. State: 2
  • Bonding Type: metallic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

Scandium

Discovered State
1876 Solid
Atomic Mass Density
44.9559085 2.985 g/L
45 21 Sc
Electrons Protons Neutrons
21 21 24
Electronic Configuration
[Ar] 3d14s2
  • Discovered By: Lars Fredrik Nilson
  • Appearance: silvery white
  • Category: transition metal
  • Melting Point: 1814 K
  • Boiling Point: 3109 K
  • Ox. State: 1, 2, 3
  • Bonding Type: metallic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.

Titanium

Discovered State
1791 Solid
Atomic Mass Density
44.9559085 4.506 g/L
48 22 Ti
Electrons Protons Neutrons
22 22 26
Electronic Configuration
[Ar] 3d24s2
  • Discovered By: William Gregor
  • Appearance: silvery grey
  • Category: transition metal
  • Melting Point: 1941 K
  • Boiling Point: 3560 K
  • Ox. State: -1, 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.54
  • Wiki Link: Source Link
  • Element Image: Image Link

Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density and high strength. It is highly resistant to corrosion in sea water, aqua regia and chlorine.

Vanadium

Discovered State
1803 Solid
Atomic Mass Density
50.94151 6 g/L
51 23 V
Electrons Protons Neutrons
23 23 28
Electronic Configuration
[Ar] 3d34s2
  • Discovered By: Andrés Manuel del Río
  • Appearance: blue-silver-grey metal
  • Category: transition metal
  • Melting Point: 2183 K
  • Boiling Point: 3680 K
  • Ox. State: -1, 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.63
  • Wiki Link: Source Link
  • Element Image: Image Link

Vanadium is a chemical element with symbol V and atomic number 23. It is a hard, silvery grey, ductile and malleable transition metal. The element is found only in chemically combined form in nature, but once isolated artificially, the formation of an oxide layer stabilizes the free metal somewhat against further oxidation.

Chromium

Discovered State
1798 Solid
Atomic Mass Density
51.99616 7.19 g/L
52 24 Cr
Electrons Protons Neutrons
24 24 28
Electronic Configuration
[Ar] 3d54s1
  • Discovered By: Louis Nicolas Vauquelin
  • Appearance: silvery metallic
  • Category: transition metal
  • Melting Point: 2180 K
  • Boiling Point: 2944 K
  • Ox. State: -2, -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 1.63
  • Wiki Link: Source Link
  • Element Image: Image Link

Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point.

Manganese

Discovered State
1774 Solid
Atomic Mass Density
54.9380443 7.21 g/L
55 25 Mn
Electrons Protons Neutrons
25 25 30
Electronic Configuration
[Ar] 3d54s2
  • Discovered By: Torbern Olof Bergman
  • Appearance: silvery metallic
  • Category: transition metal
  • Melting Point: 1519 K
  • Boiling Point: 2334 K
  • Ox. State: -2, -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 1.55
  • Wiki Link: Source Link
  • Element Image: Image Link

Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.

Iron

Discovered State
Ancient Solid
Atomic Mass Density
55.8452 7.874 g/L
56 26 Fe
Electrons Protons Neutrons
26 26 30
Electronic Configuration
[Ar] 3d64s2
  • Discovered By: 5000 BC
  • Appearance: lustrous metallic with a grayish tinge
  • Category: transition metal
  • Melting Point: 1811 K
  • Boiling Point: 3134 K
  • Ox. State: -2, -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 1.83
  • Wiki Link: Source Link
  • Element Image: Image Link

Iron is a chemical element with symbol Fe (from Latin:ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core.

Cobalt

Discovered State
Ancient Solid
Atomic Mass Density
58.9331944 8.9 g/L
59 27 Co
Electrons Protons Neutrons
27 27 32
Electronic Configuration
[Ar] 3d74s2
  • Discovered By: Georg Brandt
  • Appearance: hard lustrous gray metal
  • Category: transition metal
  • Melting Point: 1768 K
  • Boiling Point: 3200 K
  • Ox. State: -1, 1, 2, 3, 4, 5
  • Bonding Type: metallic
  • Electronegativity: 1.88
  • Wiki Link: Source Link
  • Element Image: Image Link

Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt in the Earth's crust is found only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.

Nickel

Discovered State
1751 Solid
Atomic Mass Density
58.69344 8.908 g/L
58 28 Ni
Electrons Protons Neutrons
28 28 30
Electronic Configuration
[Ar] 3d84s2
  • Discovered By: Axel Fredrik Cronstedt
  • Appearance: lustrous, metallic, and silver with a gold tinge
  • Category: transition metal
  • Melting Point: 1728 K
  • Boiling Point: 3003 K
  • Ox. State: -1, 1, 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.91
  • Wiki Link: Source Link
  • Element Image: Image Link

Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile.

Copper

Discovered State
Ancient Solid
Atomic Mass Density
63.5463 8.96 g/L
64 29 Cu
Electrons Protons Neutrons
29 29 35
Electronic Configuration
[Ar] 3d104s1
  • Discovered By: Middle East
  • Appearance: red-orange metallic luster
  • Category: transition metal
  • Melting Point: 1357.77 K
  • Boiling Point: 2835 K
  • Ox. State: 1, 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.9
  • Wiki Link: Source Link
  • Element Image: Image Link

Copper is a chemical element with symbol Cu (from Latin:cuprum) and atomic number 29. It is a soft, malleable and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color.

Zinc

Discovered State
1746 Solid
Atomic Mass Density
65.382 7.14 g/L
65 30 Zn
Electrons Protons Neutrons
30 30 35
Electronic Configuration
[Ar] 3d104s2
  • Discovered By: India
  • Appearance: silver-gray
  • Category: transition metal
  • Melting Point: 692.68 K
  • Boiling Point: 1180 K
  • Ox. State: 2
  • Bonding Type: metallic
  • Electronegativity: 1.65
  • Wiki Link: Source Link
  • Element Image: Image Link

Zinc, in commerce also spelter, is a chemical element with symbol Zn and atomic number 30. It is the first element of group 12 of the periodic table. In some respects zinc is chemically similar to magnesium:its ion is of similar size and its only common oxidation state is +2.

Gallium

Discovered State
1875 Solid
Atomic Mass Density
69.7231 5.91 g/L
70 31 Ga
Electrons Protons Neutrons
31 31 39
Electronic Configuration
[Ar] 3d104s24p1
  • Discovered By: Lecoq de Boisbaudran
  • Appearance: silver-white
  • Category: post-transition metal
  • Melting Point: 302.9146 K
  • Boiling Point: 2673 K
  • Ox. State: 1, 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.81
  • Wiki Link: Source Link
  • Element Image: Image Link

Gallium is a chemical element with symbol Ga and atomic number 31. Elemental gallium does not occur in free form in nature, but as the gallium(III) compounds that are in trace amounts in zinc ores and in bauxite. Gallium is a soft, silvery metal, and elemental gallium is a brittle solid at low temperatures, and melts at 29.76 °C (85.57 °F) (slightly above room temperature).

Germanium

Discovered State
1886 Solid
Atomic Mass Density
72.6308 5.323 g/L
73 32 Ge
Electrons Protons Neutrons
32 32 41
Electronic Configuration
[Ar] 3d104s24p2
  • Discovered By: Lecoq de Boisbaudran
  • Appearance: grayish-white
  • Category: metalloid
  • Melting Point: 1211.4 K
  • Boiling Point: 3106 K
  • Ox. State: -4, 1, 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 2.01
  • Wiki Link: Source Link
  • Element Image: Image Link

Germanium is a chemical element with symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Purified germanium is a semiconductor, with an appearance most similar to elemental silicon.

Arsenic

Discovered State
Ancient Solid
Atomic Mass Density
74.9215956 5.727 g/L
75 33 As
Electrons Protons Neutrons
33 33 42
Electronic Configuration
[Ar] 3d104s24p3
  • Discovered By: Bronze Age
  • Appearance: metallic grey
  • Category: metalloid
  • Melting Point: 1090 K
  • Boiling Point: 887 K
  • Ox. State: -3, 2, 3, 5
  • Bonding Type: metallic
  • Electronegativity: 2.18
  • Wiki Link: Source Link
  • Element Image: Image Link

Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. Arsenic is a metalloid.

Selenium

Discovered State
1817 Solid
Atomic Mass Density
78.9718 4.81 g/L
79 34 Se
Electrons Protons Neutrons
34 34 45
Electronic Configuration
[Ar] 3d104s24p4
  • Discovered By: Jöns Jakob Berzelius
  • Appearance: black, red
  • Category: polyatomic nonmetal
  • Melting Point: 494 K
  • Boiling Point: 958 K
  • Ox. State: -2, 2, 4, 6
  • Bonding Type: metallic
  • Electronegativity: 2.55
  • Wiki Link: Source Link
  • Element Image: Image Link

Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. It rarely occurs in its elemental state in nature, or as pure ore compounds.

Bromine

Discovered State
1826 Liquid
Atomic Mass Density
79.904 23.1028 g/L
80 35 Br 2
Electrons Protons Neutrons
35 35 45
Electronic Configuration
[Ar] 3d104s24p5
  • Discovered By: Antoine Jérôme Balard
  • Appearance:
  • Category: diatomic nonmetal
  • Melting Point: 265.8 K
  • Boiling Point: 332 K
  • Ox. State: -1, 1, 3, 4, 5, 7
  • Bonding Type: covalent network
  • Electronegativity: 2.96
  • Wiki Link: Source Link
  • Element Image: Image Link

Bromine (from Ancient Greek:βρῶμος, brómos, meaning "stench") is a chemical element with symbol Br, and atomic number 35. It is a halogen. The element was isolated independently by two chemists, Carl Jacob Löwig and Antoine Jerome Balard, in 1825–1826.

Krypton

Discovered State
1898 Gas
Atomic Mass Density
83.7982 3.749 g/L
84 36 Kr
Electrons Protons Neutrons
36 36 48
Electronic Configuration
[Ar] 3d104s24p6
  • Discovered By: William Ramsay
  • Appearance: colorless gas
  • Category: noble gas
  • Melting Point: 115.78 K
  • Boiling Point: 119.93 K
  • Ox. State: 2
  • Bonding Type: atomic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Krypton (from Greek:κρυπτός kryptos "the hidden one") is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 (noble gases) elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquefied air, and is often used with other rare gases in fluorescent lamps.

Rubidium

Discovered State
1861 Solid
Atomic Mass Density
85.46783 1.532 g/L
85 37 Rb
Electrons Protons Neutrons
37 37 48
Electronic Configuration
[Kr] 5s1
  • Discovered By: Robert Bunsen
  • Appearance: grey white
  • Category: alkali metal
  • Melting Point: 312.45 K
  • Boiling Point: 961 K
  • Ox. State: 1
  • Bonding Type: metallic
  • Electronegativity: 0.82
  • Wiki Link: Source Link
  • Element Image: Image Link

Rubidium is a chemical element with symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, such as very rapid oxidation in air.

Strontium

Discovered State
1790 Solid
Atomic Mass Density
87.621 2.64 g/L
88 38 Sr
Electrons Protons Neutrons
38 38 50
Electronic Configuration
[Kr] 5s2
  • Discovered By: William Cruickshank (chemist)
  • Appearance:
  • Category: alkaline earth metal
  • Melting Point: 1050 K
  • Boiling Point: 1650 K
  • Ox. State: 2
  • Bonding Type: metallic
  • Electronegativity: 0.95
  • Wiki Link: Source Link
  • Element Image: Image Link

Strontium is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when it is exposed to air.

Yttrium

Discovered State
1794 Solid
Atomic Mass Density
88.905842 4.472 g/L
89 39 Y
Electrons Protons Neutrons
39 39 50
Electronic Configuration
[Kr] 4d15s2
  • Discovered By: Johan Gadolin
  • Appearance: silvery white
  • Category: transition metal
  • Melting Point: 1799 K
  • Boiling Point: 3203 K
  • Ox. State: 1, 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.22
  • Wiki Link: Source Link
  • Element Image: Image Link

Yttrium is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and it has often been classified as a "rare earth element". Yttrium is almost always found combined with the lanthanides in rare earth minerals and is never found in nature as a free element.

Zirconium

Discovered State
1789 Solid
Atomic Mass Density
91.2242 6.52 g/L
91 40 Zr
Electrons Protons Neutrons
40 40 51
Electronic Configuration
[Kr] 4d25s2
  • Discovered By: Martin Heinrich Klaproth
  • Appearance: silvery white
  • Category: transition metal
  • Melting Point: 2128 K
  • Boiling Point: 4650 K
  • Ox. State: 1, 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.33
  • Wiki Link: Source Link
  • Element Image: Image Link

Zirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun زرگون, meaning "gold-colored".

Niobium

Discovered State
1801 Solid
Atomic Mass Density
92.906372 8.57 g/L
93 41 Nb
Electrons Protons Neutrons
41 41 52
Electronic Configuration
[Kr] 4d45s1
  • Discovered By: Charles Hatchett
  • Appearance: gray metallic, bluish when oxidized
  • Category: transition metal
  • Melting Point: 2750 K
  • Boiling Point: 5017 K
  • Ox. State: -1, 2, 3, 4, 5
  • Bonding Type: metallic
  • Electronegativity: 1.6
  • Wiki Link: Source Link
  • Element Image: Image Link

Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. The name comes from Greek mythology:Niobe, daughter of Tantalus since it is so similar to tantalum.

Molybdenum

Discovered State
1778 Solid
Atomic Mass Density
95.951 10.28 g/L
96 42 Mo
Electrons Protons Neutrons
42 42 54
Electronic Configuration
[Kr] 4d55s1
  • Discovered By: Carl Wilhelm Scheele
  • Appearance: gray metallic,
  • Category: transition metal
  • Melting Point: 2896 K
  • Boiling Point: 4912 K
  • Ox. State: -2, -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 2.16
  • Wiki Link: Source Link
  • Element Image: Image Link

Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele.

Technetium

Discovered State
1937 Solid
Atomic Mass Density
98 11 g/L
98 43 Tc
Electrons Protons Neutrons
43 43 55
Electronic Configuration
[Kr] 4d55s2
  • Discovered By: Emilio Segrè
  • Appearance: shiny gray metal
  • Category: transition metal
  • Melting Point: 2430 K
  • Boiling Point: 4538 K
  • Ox. State: -3, -1, 1, 2, 3, 4, 5, 6, 7
  • Bonding Type: metallic
  • Electronegativity: 1.9
  • Wiki Link: Source Link
  • Element Image: Image Link

Technetium (/tɛkˈniːʃiəm/) is a chemical element with symbol Tc and atomic number 43. It is the element with the lowest atomic number in the periodic table that has no stable isotopes:every form of it is radioactive. Nearly all technetium is produced synthetically, and only minute amounts are found in nature.

Ruthenium

Discovered State
1827 Solid
Atomic Mass Density
101.072 12.37 g/L
101 44 Ru
Electrons Protons Neutrons
44 44 57
Electronic Configuration
[Kr] 4d75s1
  • Discovered By: Karl Ernst Claus
  • Appearance: silvery white metallic
  • Category: transition metal
  • Melting Point: 2607 K
  • Boiling Point: 4423 K
  • Ox. State: -2, 1, 2, 3, 4, 5, 6, 7, 8
  • Bonding Type: metallic
  • Electronegativity: 2.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals.

Rhodium

Discovered State
1803 Solid
Atomic Mass Density
101.072 12.41 g/L
103 45 Rh
Electrons Protons Neutrons
45 45 58
Electronic Configuration
[Kr] 4d85s1
  • Discovered By: William Hyde Wollaston
  • Appearance: silvery white metallic
  • Category: transition metal
  • Melting Point: 2237 K
  • Boiling Point: 3968 K
  • Ox. State: -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 2.28
  • Wiki Link: Source Link
  • Element Image: Image Link

Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group.

Palladium

Discovered State
1803 Solid
Atomic Mass Density
106.421 12.023 g/L
106 46 Pd
Electrons Protons Neutrons
46 46 60
Electronic Configuration
[Kr] 4d10
  • Discovered By: William Hyde Wollaston
  • Appearance: silvery white
  • Category: transition metal
  • Melting Point: 1828.05 K
  • Boiling Point: 3236 K
  • Ox. State: 2, 4
  • Bonding Type: metallic
  • Electronegativity: 2.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Palladium is a chemical element with symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas.

Silver

Discovered State
Ancient Solid
Atomic Mass Density
107.86822 10.49 g/L
108 47 Ag
Electrons Protons Neutrons
47 47 61
Electronic Configuration
[Kr] 4d105s1
  • Discovered By: unknown, before 5000 BC
  • Appearance: lustrous white metal
  • Category: transition metal
  • Melting Point: 1234.93 K
  • Boiling Point: 2435 K
  • Ox. State: 1, 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.93
  • Wiki Link: Source Link
  • Element Image: Image Link

Silver is a chemical element with symbol Ag (Greek:άργυρος árguros, Latin:argentum, both from the Indo-European root *h₂erǵ- for "grey" or "shining") and atomic number 47. A soft, white, lustrous transition metal, it possesses the highest electrical conductivity, thermal conductivity and reflectivity of any metal. The metal occurs naturally in its pure, free form (native silver), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite.

Cadmium

Discovered State
1817 Solid
Atomic Mass Density
112.4144 8.65 g/L
112 48 Cd
Electrons Protons Neutrons
48 48 64
Electronic Configuration
[Kr] 4d105s2
  • Discovered By: Karl Samuel Leberecht Hermann
  • Appearance: silvery bluish-gray metallic
  • Category: transition metal
  • Melting Point: 594.22 K
  • Boiling Point: 1040 K
  • Ox. State: 2
  • Bonding Type: metallic
  • Electronegativity: 1.69
  • Wiki Link: Source Link
  • Element Image: Image Link

Cadmium is a chemical element with symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it prefers oxidation state +2 in most of its compounds and like mercury it shows a low melting point compared to transition metals.

Indium

Discovered State
1863 Solid
Atomic Mass Density
114.8181 7.31 g/L
115 49 In
Electrons Protons Neutrons
49 49 66
Electronic Configuration
[Kr] 4d105s25p1
  • Discovered By: Ferdinand Reich
  • Appearance: silvery lustrous gray
  • Category: post-transition metal
  • Melting Point: 429.7485 K
  • Boiling Point: 2345 K
  • Ox. State: 1, 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.78
  • Wiki Link: Source Link
  • Element Image: Image Link

Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metallic element that is rare in Earth's crust. The metal is very soft, malleable and easily fusible, with a melting point higher than sodium, but lower than lithium or tin.

Tin

Discovered State
Ancient Solid
Atomic Mass Density
118.7107 7.365 g/L
119 50 Sn
Electrons Protons Neutrons
50 50 69
Electronic Configuration
[Kr] 4d105s25p2
  • Discovered By: unknown, before 3500 BC
  • Appearance: silvery-white (beta, β) or gray (alpha, α)
  • Category: post-transition metal
  • Melting Point: 505.08 K
  • Boiling Point: 2875 K
  • Ox. State: -4, 2, 4
  • Bonding Type: metallic
  • Electronegativity: 1.96
  • Wiki Link: Source Link
  • Element Image: Image Link

Tin is a chemical element with the symbol Sn (for Latin:stannum) and atomic number 50. It is a main group metal in group 14 of the periodic table. Tin shows a chemical similarity to both neighboring group-14 elements, germanium and lead, and has two possible oxidation states, +2 and the slightly more stable +4.

Antimony

Discovered State
Ancient Solid
Atomic Mass Density
121.7601 6.697 g/L
122 51 Sb
Electrons Protons Neutrons
51 51 71
Electronic Configuration
[Kr] 4d105s25p3
  • Discovered By: unknown, before 3000 BC
  • Appearance: silvery lustrous gray
  • Category: metalloid
  • Melting Point: 903.78 K
  • Boiling Point: 1908 K
  • Ox. State: -3, 3, 5
  • Bonding Type: metallic
  • Electronegativity: 2.05
  • Wiki Link: Source Link
  • Element Image: Image Link

Antimony is a chemical element with symbol Sb (from Latin:stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead upon its discovery.

Tellurium

Discovered State
1782 Solid
Atomic Mass Density
127.603 6.24 g/L
128 52 Te
Electrons Protons Neutrons
52 52 76
Electronic Configuration
[Kr] 4d105s25p4
  • Discovered By: Franz-Joseph Müller von Reichenstein
  • Appearance:
  • Category: metalloid
  • Melting Point: 722.66 K
  • Boiling Point: 1261 K
  • Ox. State: -2, 2, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 2.1
  • Wiki Link: Source Link
  • Element Image: Image Link

Tellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur.

Iodine

Discovered State
1811 Solid
Atomic Mass Density
126.904473 4.933 g/L
127 53 I 2
Electrons Protons Neutrons
53 53 74
Electronic Configuration
[Kr] 4d105s25p5
  • Discovered By: Bernard Courtois
  • Appearance: lustrous metallic gray, violet as a gas
  • Category: halogen
  • Melting Point: 386.85 K
  • Boiling Point: 457.4 K
  • Ox. State: -1, 1, 3, 5, 7
  • Bonding Type: metallic
  • Electronegativity: 2.66
  • Wiki Link: Source Link
  • Element Image: Image Link

Iodine is a chemical element with symbol I and atomic number 53. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of iodine vapor. Iodine and its compounds are primarily used in nutrition, and industrially in the production of acetic acid and certain polymers.

Xenon

Discovered State
1898 Gas
Atomic Mass Density
131.2936 5.894 g/L
131 54 Xe
Electrons Protons Neutrons
54 54 77
Electronic Configuration
[Kr] 4d105s25p6
  • Discovered By: William Ramsay
  • Appearance: colorless gas
  • Category: noble gas
  • Melting Point: 161.4 K
  • Boiling Point: 165.051 K
  • Ox. State: 2, 4, 6, 8
  • Bonding Type: metallic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Xenon is a chemical element with symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas, that occurs in the Earth's atmosphere in trace amounts. Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.

Caesium

Discovered State
1860 Solid
Atomic Mass Density
132.905451966 1.93 g/L
133 55 Cs
Electrons Protons Neutrons
55 55 78
Electronic Configuration
[Xe] 6s1
  • Discovered By: Robert Bunsen
  • Appearance: silvery gold
  • Category: alkali metal
  • Melting Point: 301.7 K
  • Boiling Point: 944 K
  • Ox. State: 1
  • Bonding Type: metallic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Caesium or cesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (82 °F), which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium is an alkali metal and has physical and chemical properties similar to those of rubidium and potassium.

Barium

Discovered State
1808 Solid
Atomic Mass Density
137.3277 3.51 g/L
137 56 Ba
Electrons Protons Neutrons
56 56 81
Electronic Configuration
[Xe] 6s2
  • Discovered By: Carl Wilhelm Scheele
  • Appearance: silvery gold
  • Category: alkaline earth metal
  • Melting Point: 1000 K
  • Boiling Point: 2118 K
  • Ox. State: 2
  • Bonding Type: metallic
  • Electronegativity: 0.89
  • Wiki Link: Source Link
  • Element Image: Image Link

Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity barium is never found in nature as a free element.

Lanthanum

Discovered State
1839 Solid
Atomic Mass Density
138.905477 6.162 g/L
139 57 La
Electrons Protons Neutrons
57 57 82
Electronic Configuration
[Xe] 5d16s2
  • Discovered By: Carl Gustaf Mosander
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1193 K
  • Boiling Point: 3737 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.1
  • Wiki Link: Source Link
  • Element Image: Image Link

Lanthanum is a soft, ductile, silvery-white metallic chemical element with symbol La and atomic number 57. It tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. It gave its name to the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table:it is also sometimes considered the first element of the 6th-period transition metals.

Cerium

Discovered State
1803 Solid
Atomic Mass Density
140.1161 6.77 g/L
140 58 Ce
Electrons Protons Neutrons
58 58 82
Electronic Configuration
[Xe] 4f15d16s2
  • Discovered By: Martin Heinrich Klaproth
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1068 K
  • Boiling Point: 3716 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.12
  • Wiki Link: Source Link
  • Element Image: Image Link

Cerium is a chemical element with symbol Ce and atomic number 58. It is a soft, silvery, ductile metal which easily oxidizes in air. Cerium was named after the dwarf planet Ceres (itself named after the Roman goddess of agriculture).

Praseodymium

Discovered State
1885 Solid
Atomic Mass Density
140.907662 6.77 g/L
141 59 Pr
Electrons Protons Neutrons
59 59 82
Electronic Configuration
[Xe] 4f36s2
  • Discovered By: Carl Auer von Welsbach
  • Appearance: grayish white
  • Category: lanthanide
  • Melting Point: 1208 K
  • Boiling Point: 3403 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.13
  • Wiki Link: Source Link
  • Element Image: Image Link

Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is valued for its magnetic, electrical, chemical, and optical properties.

Neodymium

Discovered State
1885 Solid
Atomic Mass Density
144.2423 7.01 g/L
144 60 Nd
Electrons Protons Neutrons
60 60 84
Electronic Configuration
[Xe] 4f46s2
  • Discovered By: Carl Auer von Welsbach
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1297 K
  • Boiling Point: 3347 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.14
  • Wiki Link: Source Link
  • Element Image: Image Link

Neodymium is a chemical element with symbol Nd and atomic number 60. It is a soft silvery metal that tarnishes in air. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach.

Promethium

Discovered State
1947 Solid
Atomic Mass Density
145 7.26 g/L
145 61 Pm
Electrons Protons Neutrons
61 61 84
Electronic Configuration
[Xe] 4f56s2
  • Discovered By: Chien Shiung Wu
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1315 K
  • Boiling Point: 3273 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.13
  • Wiki Link: Source Link
  • Element Image: Image Link

Promethium, originally prometheum, is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive; it is one of only two such elements that are followed in the periodic table by elements with stable forms, a distinction shared with technetium. Chemically, promethium is a lanthanide, which forms salts when combined with other elements.

Samarium

Discovered State
1853 Solid
Atomic Mass Density
150.362 7.52 g/L
150 62 Sm
Electrons Protons Neutrons
62 62 88
Electronic Configuration
[Xe] 4f66s2
  • Discovered By: Lecoq de Boisbaudran
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1345 K
  • Boiling Point: 2173 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.17
  • Wiki Link: Source Link
  • Element Image: Image Link

Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that readily oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes the oxidation state +3.

Europium

Discovered State
1901 Solid
Atomic Mass Density
151.9641 5.264 g/L
152 63 Eu
Electrons Protons Neutrons
63 63 89
Electronic Configuration
[Xe] 4f76s2
  • Discovered By: Eugène-Anatole Demarçay
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1099 K
  • Boiling Point: 1802 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water.

Gadolinium

Discovered State
1880 Solid
Atomic Mass Density
157.253 7.9 g/L
157 64 Gd
Electrons Protons Neutrons
64 64 93
Electronic Configuration
[Xe] 4f75d16s2
  • Discovered By: Jean Charles Galissard de Marignac
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1585 K
  • Boiling Point: 3273 K
  • Ox. State: 1, 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Gadolinium is a chemical element with symbol Gd and atomic number 64. It is a silvery-white, malleable and ductile rare-earth metal. It is found in nature only in combined (salt) form.

Terbium

Discovered State
1843 Solid
Atomic Mass Density
158.925352 8.23 g/L
159 65 Tb
Electrons Protons Neutrons
65 65 94
Electronic Configuration
[Xe] 4f96s2
  • Discovered By: Carl Gustaf Mosander
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1629 K
  • Boiling Point: 3396 K
  • Ox. State: 1, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite.

Dysprosium

Discovered State
1886 Solid
Atomic Mass Density
162.5001 8.54 g/L
163 66 Dy
Electrons Protons Neutrons
66 66 97
Electronic Configuration
[Xe] 4f96s2
  • Discovered By: Lecoq de Boisbaudran
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1680 K
  • Boiling Point: 2840 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.22
  • Wiki Link: Source Link
  • Element Image: Image Link

Dysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime.

Holmium

Discovered State
1878 Solid
Atomic Mass Density
164.930332 8.79 g/L
165 67 Ho
Electrons Protons Neutrons
67 67 98
Electronic Configuration
[Xe] 4f116s2
  • Discovered By: Marc Delafontaine
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1734 K
  • Boiling Point: 2873 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.23
  • Wiki Link: Source Link
  • Element Image: Image Link

Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve.

Erbium

Discovered State
1842 Solid
Atomic Mass Density
167.2593 9.066 g/L
167 68 Er
Electrons Protons Neutrons
68 68 99
Electronic Configuration
[Xe] 4f126s2
  • Discovered By: Carl Gustaf Mosander
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1802 K
  • Boiling Point: 3141 K
  • Ox. State: 3
  • Bonding Type: metallic
  • Electronegativity: 1.24
  • Wiki Link: Source Link
  • Element Image: Image Link

Erbium is a chemical element in the lanthanide series, with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements on Earth. As such, it is a rare earth element which is associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden, where yttrium, ytterbium, and terbium were discovered.

Thulium

Discovered State
1879 Solid
Atomic Mass Density
168.934222 9.32 g/L
169 69 Tm
Electrons Protons Neutrons
69 69 100
Electronic Configuration
[Xe] 4f136s2
  • Discovered By: Per Teodor Cleve
  • Appearance: silvery gray
  • Category: lanthanide
  • Melting Point: 1818 K
  • Boiling Point: 2223 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.25
  • Wiki Link: Source Link
  • Element Image: Image Link

Thulium is a chemical element with symbol Tm and atomic number 69. It is the thirteenth and antepenultimate (third-last) element in the lanthanide series. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other compounds.

Ytterbium

Discovered State
1878 Solid
Atomic Mass Density
173.0451 6.9 g/L
173 70 Yb
Electrons Protons Neutrons
70 70 103
Electronic Configuration
[Xe] 4f146s2
  • Discovered By: Jean Charles Galissard de Marignac
  • Appearance: silvery gray
  • Category: lanthanide
  • Melting Point: 1097 K
  • Boiling Point: 1469 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.1
  • Wiki Link: Source Link
  • Element Image: Image Link

Ytterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state. However, like the other lanthanides, its most common oxidation state is +3, seen in its oxide, halides and other compounds.

Lutetium

Discovered State
1907 Solid
Atomic Mass Density
174.96681 9.841 g/L
175 71 Lu
Electrons Protons Neutrons
71 71 104
Electronic Configuration
[Xe] 4f145d16s2
  • Discovered By: Georges Urbain
  • Appearance: silvery white
  • Category: lanthanide
  • Melting Point: 1925 K
  • Boiling Point: 3675 K
  • Ox. State: 3
  • Bonding Type: metallic
  • Electronegativity: 1.27
  • Wiki Link: Source Link
  • Element Image: Image Link

Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths.

Hafnium

Discovered State
1923 Solid
Atomic Mass Density
178.492 13.31 g/L
178 72 Hf
Electrons Protons Neutrons
72 72 106
Electronic Configuration
[Xe] 4f145d26s2
  • Discovered By: Dirk Coster
  • Appearance: steel gray
  • Category: transition metal
  • Melting Point: 2506 K
  • Boiling Point: 4876 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Its existence was predicted by Dmitri Mendeleev in 1869, though it was not identified until 1923, making it the penultimate stable element to be discovered (rhenium was identified two years later).

Tantalum

Discovered State
1802 Solid
Atomic Mass Density
180.947882 16.69 g/L
181 73 Ta
Electrons Protons Neutrons
73 73 108
Electronic Configuration
[Xe] 4f145d36s2
  • Discovered By: Anders Gustaf Ekeberg
  • Appearance: gray blue
  • Category: transition metal
  • Melting Point: 3290 K
  • Boiling Point: 5731 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.5
  • Wiki Link: Source Link
  • Element Image: Image Link

Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, an antihero from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant.

Tungsten

Discovered State
1783 Solid
Atomic Mass Density
183.841 19.25 g/L
184 74 W
Electrons Protons Neutrons
74 74 110
Electronic Configuration
[Xe] 4f145d46s2
  • Discovered By: Carl Wilhelm Scheele
  • Appearance: grayish white, lustrous
  • Category: transition metal
  • Melting Point: 3695 K
  • Boiling Point: 6203 K
  • Ox. State: -2, -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 2.36
  • Wiki Link: Source Link
  • Element Image: Image Link

Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74. The word tungsten comes from the Swedish language tung sten, which directly translates to heavy stone. Its name in Swedish is volfram, however, in order to distinguish it from scheelite, which in Swedish is alternatively named tungsten.

Rhenium

Discovered State
1925 Solid
Atomic Mass Density
186.2071 21.02 g/L
186 75 Re
Electrons Protons Neutrons
75 75 111
Electronic Configuration
[Xe] 4f145d56s2
  • Discovered By: Masataka Ogawa
  • Appearance: silvery-grayish
  • Category: transition metal
  • Melting Point: 3459 K
  • Boiling Point: 5869 K
  • Ox. State: -3, -1, 1, 2, 3, 4, 5, 6, 7
  • Bonding Type: metallic
  • Electronegativity: 1.9
  • Wiki Link: Source Link
  • Element Image: Image Link

Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.

Osmium

Discovered State
1803 Solid
Atomic Mass Density
190.233 22.59 g/L
187 76 Os
Electrons Protons Neutrons
76 76 111
Electronic Configuration
[Xe] 4f145d66s2
  • Discovered By: Smithson Tennant
  • Appearance: silvery, blue cast
  • Category: transition metal
  • Melting Point: 3306 K
  • Boiling Point: 5285 K
  • Ox. State: -2, -1, 1, 2, 3, 4, 5, 6, 7, 8
  • Bonding Type: metallic
  • Electronegativity: 2.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Osmium (from Greek osme (ὀσμή) meaning "smell") is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3.

Iridium

Discovered State
1803 Solid
Atomic Mass Density
192.2173 22.56 g/L
192 77 Ir
Electrons Protons Neutrons
77 77 115
Electronic Configuration
[Xe] 4f145d76s2
  • Discovered By: Smithson Tennant
  • Appearance: silvery white
  • Category: transition metal
  • Melting Point: 2719 K
  • Boiling Point: 4403 K
  • Ox. State: -3, -1, 1, 2, 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 2.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium) based on measured density, although calculations involving the space lattices of the elements show that iridium is denser. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Although only certain molten salts and halogens are corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable.

Platinum

Discovered State
Ancient Solid
Atomic Mass Density
195.0849 21.45 g/L
195 78 Pt
Electrons Protons Neutrons
78 78 117
Electronic Configuration
[Xe] 4f145d96s1
  • Discovered By: Antonio de Ulloa
  • Appearance: silvery white
  • Category: transition metal
  • Melting Point: 2041.4 K
  • Boiling Point: 4098 K
  • Ox. State: 2, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 2.28
  • Wiki Link: Source Link
  • Element Image: Image Link

Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, gray-white transition metal. Its name is derived from the Spanish term platina, which is literally translated into "little silver".

Gold

Discovered State
Ancient Solid
Atomic Mass Density
196.9665695 19.3 g/L
197 79 Au
Electrons Protons Neutrons
79 79 118
Electronic Configuration
[Xe] 4f145d106s1
  • Discovered By: Middle East
  • Appearance: metallic yellow
  • Category: transition metal
  • Melting Point: 1337.33 K
  • Boiling Point: 3243 K
  • Ox. State: -1, 1, 2, 3, 5
  • Bonding Type: metallic
  • Electronegativity: 2.54
  • Wiki Link: Source Link
  • Element Image: Image Link

Gold is a chemical element with symbol Au (from Latin:aurum) and atomic number 79. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable and ductile metal. Chemically, gold is a transition metal and a group 11 element.

Mercury

Discovered State
Ancient Liquid
Atomic Mass Density
200.5923 13.534 g/L
201 80 Hg
Electrons Protons Neutrons
80 80 121
Electronic Configuration
[Xe] 4f145d106s2
  • Discovered By: unknown, before 2000 BCE
  • Appearance: silvery
  • Category: transition metal
  • Melting Point: 234.321 K
  • Boiling Point: 629.88 K
  • Ox. State: 1, 2, 4
  • Bonding Type: metallic
  • Electronegativity: 2
  • Wiki Link: Source Link
  • Element Image: Image Link

Mercury is a chemical element with symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum (/haɪˈdrɑːrdʒərəm/). A heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature.

Thallium

Discovered State
1861 Solid
Atomic Mass Density
204.38 11.85 g/L
204 81 Tl
Electrons Protons Neutrons
81 81 123
Electronic Configuration
[Xe] 4f145d106s26p1
  • Discovered By: William Crookes
  • Appearance: silvery white
  • Category: post-transition metal
  • Melting Point: 577 K
  • Boiling Point: 1746 K
  • Ox. State: 1, 3
  • Bonding Type: metallic
  • Electronegativity: 2.04
  • Wiki Link: Source Link
  • Element Image: Image Link

Thallium is a chemical element with symbol Tl and atomic number 81. This soft gray post-transition metal is not found free in nature. When isolated, it resembles tin, but discolors when exposed to air.

Lead

Discovered State
Ancient Solid
Atomic Mass Density
207.21 11.34 g/L
208 82 Pb
Electrons Protons Neutrons
82 82 126
Electronic Configuration
[Xe] 4f145d106s26p2
  • Discovered By: Middle East
  • Appearance: metallic gray
  • Category: post-transition metal
  • Melting Point: 600.61 K
  • Boiling Point: 2022 K
  • Ox. State: -4, 2, 4
  • Bonding Type: metallic
  • Electronegativity: 2.33
  • Wiki Link: Source Link
  • Element Image: Image Link

Lead (/lɛd/) is a chemical element in the carbon group with symbol Pb (from Latin:plumbum) and atomic number 82. Lead is a soft, malleable and heavy post-transition metal. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed to air.

Bismuth

Discovered State
Ancient Solid
Atomic Mass Density
208.980401 9.78 g/L
206 83 Bi
Electrons Protons Neutrons
83 83 123
Electronic Configuration
[Xe] 4f145d106s26p3
  • Discovered By: Claude François Geoffroy
  • Appearance: lustrous silver
  • Category: post-transition metal
  • Melting Point: 544.7 K
  • Boiling Point: 1837 K
  • Ox. State: -3, 3, 5
  • Bonding Type: metallic
  • Electronegativity: 2.02
  • Wiki Link: Source Link
  • Element Image: Image Link

Bismuth is a chemical element with symbol Bi and atomic number 83. Bismuth, a pentavalent post-transition metal, chemically resembles arsenic and antimony. Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores.

Polonium

Discovered State
1898 Solid
Atomic Mass Density
209 9.196 g/L
209 84 Po
Electrons Protons Neutrons
84 84 125
Electronic Configuration
[Xe] 4f145d106s26p4
  • Discovered By: Pierre Curie
  • Appearance: silvery
  • Category: post-transition metal
  • Melting Point: 527 K
  • Boiling Point: 1235 K
  • Ox. State: -2, 2, 4, 6
  • Bonding Type: metallic
  • Electronegativity: 2
  • Wiki Link: Source Link
  • Element Image: Image Link

Polonium is a chemical element with symbol Po and atomic number 84, discovered in 1898 by Marie Curie and Pierre Curie. A rare and highly radioactive element with no stable isotopes, polonium is chemically similar to bismuth and tellurium, and it occurs in uranium ores. Applications of polonium are few.

Astatine

Discovered State
1940 Solid
Atomic Mass Density
210 26.35 g/L
210 85 At
Electrons Protons Neutrons
85 85 125
Electronic Configuration
[Xe] 4f145d106s26p5
  • Discovered By: Dale R. Corson
  • Appearance: silvery
  • Category: metalloid
  • Melting Point: 575 K
  • Boiling Point: 610 K
  • Ox. State: -1, 1, 3, 5
  • Bonding Type: metallic
  • Electronegativity: 2.2
  • Wiki Link: Source Link
  • Element Image: Image Link

Astatine is a very rare radioactive chemical element with the chemical symbol At and atomic number 85. It occurs on Earth as the decay product of various heavier elements. All its isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.

Radon

Discovered State
1900 Gas
Atomic Mass Density
222 9.73 g/L
222 86 Rn
Electrons Protons Neutrons
86 86 136
Electronic Configuration
[Xe] 4f145d106s26p6
  • Discovered By: Friedrich Ernst Dorn
  • Appearance: colorless gas
  • Category: noble gas
  • Melting Point: 202 K
  • Boiling Point: 211.5 K
  • Ox. State: 2
  • Bonding Type: metallic
  • Electronegativity:
  • Wiki Link: Source Link
  • Element Image: Image Link

Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas, occurring naturally as a decay product of radium. Its most stable isotope, 222Rn, has a half-life of 3.8 days.

Francium

Discovered State
1939 Solid
Atomic Mass Density
223 1.87 g/L
223 87 Fr
Electrons Protons Neutrons
87 87 136
Electronic Configuration
[Rn] 7s1
  • Discovered By: Marguerite Perey
  • Appearance:
  • Category: alkali metal
  • Melting Point: 300 K
  • Boiling Point: 950 K
  • Ox. State: 1
  • Bonding Type: metallic
  • Electronegativity: 0.7
  • Wiki Link: Source Link
  • Element Image: Image Link

Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon.

Radium

Discovered State
1898 Solid
Atomic Mass Density
226 5.5 g/L
226 88 Ra
Electrons Protons Neutrons
88 88 138
Electronic Configuration
[Rn] 7s2
  • Discovered By: Pierre Curie
  • Appearance:
  • Category: alkaline earth metal
  • Melting Point: 1233 K
  • Boiling Point: 2010 K
  • Ox. State: 3
  • Bonding Type: metallic
  • Electronegativity: 0.9
  • Wiki Link: Source Link
  • Element Image: Image Link

Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is almost colorless, but it readily combines with nitrogen (rather than oxygen) on exposure to air, forming a black surface layer of radium nitride (Ra3N2).

Actinium

Discovered State
1898 Solid
Atomic Mass Density
226 10 g/L
227 89 Ac
Electrons Protons Neutrons
89 89 138
Electronic Configuration
[Rn] 6d17s2
  • Discovered By: Friedrich Oskar Giesel
  • Appearance:
  • Category: actinide
  • Melting Point: 1500 K
  • Boiling Point: 3500 K
  • Ox. State: 3
  • Bonding Type: metallic
  • Electronegativity: 1.1
  • Wiki Link: Source Link
  • Element Image: Image Link

Actinium is a radioactive chemical element with symbol Ac (not to be confused with the abbreviation for an acetyl group) and atomic number 89, which was discovered in 1899. It was the first non-primordial radioactive element to be isolated. Polonium, radium and radon were observed before actinium, but they were not isolated until 1902.

Thorium

Discovered State
1828 Solid
Atomic Mass Density
232.03774 11.724 g/L
232 90 Th
Electrons Protons Neutrons
90 90 142
Electronic Configuration
[Rn] 6d27s2
  • Discovered By: Jöns Jakob Berzelius
  • Appearance: silvery
  • Category: actinide
  • Melting Point: 2023 K
  • Boiling Point: 5061 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Thorium is a chemical element with symbol Th and atomic number 90. A radioactive actinide metal, thorium is one of only two significantly radioactive elements that still occur naturally in large quantities as a primordial element (the other being uranium). It was discovered in 1828 by the Norwegian Reverend and amateur mineralogist Morten Thrane Esmark and identified by the Swedish chemist Jöns Jakob Berzelius, who named it after Thor, the Norse god of thunder.

Protactinium

Discovered State
1913 Solid
Atomic Mass Density
231.035882 15.37 g/L
231 91 Pa
Electrons Protons Neutrons
91 91 140
Electronic Configuration
[Rn] 5f2 6d1 7s2
  • Discovered By: William Crookes
  • Appearance: bright, silvery metallic luster
  • Category: actinide
  • Melting Point: 1841 K
  • Boiling Point: 4300 K
  • Ox. State: 3, 4, 5
  • Bonding Type: metallic
  • Electronegativity: 1.5
  • Wiki Link: Source Link
  • Element Image: Image Link

Protactinium is a chemical element with symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds where protactinium is usually present in the oxidation state +5, but can also assume +4 and even +2 or +3 states.

Uranium

Discovered State
1789 Solid
Atomic Mass Density
238.028913 19.1 g/L
238 92 U
Electrons Protons Neutrons
92 92 146
Electronic Configuration
[Rn] 5f3 6d1 7s2
  • Discovered By: Martin Heinrich Klaproth
  • Appearance:
  • Category: actinide
  • Melting Point: 1405.3 K
  • Boiling Point: 4404 K
  • Ox. State: 3, 4, 5, 6
  • Bonding Type: metallic
  • Electronegativity: 1.38
  • Wiki Link: Source Link
  • Element Image: Image Link

Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.

Neptunium

Discovered State
1940 Solid
Atomic Mass Density
237 20.45 g/L
237 93 Np
Electrons Protons Neutrons
93 93 144
Electronic Configuration
[Rn] 5f3 6d1 7s2
  • Discovered By: Edwin McMillan
  • Appearance:
  • Category: actinide
  • Melting Point: 912 K
  • Boiling Point: 4447 K
  • Ox. State: 3, 4, 5, 6, 7
  • Bonding Type: metallic
  • Electronegativity: 1.36
  • Wiki Link: Source Link
  • Element Image: Image Link

Neptunium is a chemical element with symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. Its position in the periodic table just after uranium, named after the planet Uranus, led to it being named after Neptune, the next planet beyond Uranus.

Plutonium

Discovered State
1940 Solid
Atomic Mass Density
244 19.816 g/L
333 94 Pu
Electrons Protons Neutrons
94 94 239
Electronic Configuration
[Rn] 5f6 7s2
  • Discovered By: Glenn T. Seaborg
  • Appearance: silvery white
  • Category: actinide
  • Melting Point: 912.5 K
  • Boiling Point: 3505 K
  • Ox. State: 3, 4, 5, 6, 7
  • Bonding Type: metallic
  • Electronegativity: 1.28
  • Wiki Link: Source Link
  • Element Image: Image Link

Plutonium is a transuranic radioactive chemical element with symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states.

Americium

Discovered State
1944 Solid
Atomic Mass Density
243 12 g/L
243 95 Am
Electrons Protons Neutrons
95 95 148
Electronic Configuration
[Rn] 5f7 7s2
  • Discovered By: Glenn T. Seaborg
  • Appearance: silvery white
  • Category: actinide
  • Melting Point: 1449 K
  • Boiling Point: 2880 K
  • Ox. State: 3, 4, 5, 6, 7
  • Bonding Type: metallic
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Americium is a radioactive transuranic chemical element with symbol Am and atomic number 95. This member of the actinide series is located in the periodic table under the lanthanide element europium, and thus by analogy was named after the Americas. Americium was first produced in 1944 by the group of Glenn T.Seaborg from Berkeley, California, at the metallurgical laboratory of University of Chicago.

Curium

Discovered State
1944 Solid
Atomic Mass Density
247 13.51 g/L
247 96 Cm
Electrons Protons Neutrons
96 96 151
Electronic Configuration
[Rn] 5f7 6d1 7s2
  • Discovered By: Glenn T. Seaborg
  • Appearance: silvery metallic
  • Category: actinide
  • Melting Point: 1613 K
  • Boiling Point: 3383 K
  • Ox. State: 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series was named after Marie and Pierre Curie – both were known for their research on radioactivity. Curium was first intentionally produced and identified in July 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley.

Berkelium

Discovered State
1949 Solid
Atomic Mass Density
247 14.78 g/L
247 97 Bk
Electrons Protons Neutrons
97 97 150
Electronic Configuration
[Rn] 5f9 7s2
  • Discovered By: Lawrence Berkeley National Laboratory
  • Appearance: silvery
  • Category: actinide
  • Melting Point: 1259 K
  • Boiling Point: 2900 K
  • Ox. State: 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Berkelium is a transuranic radioactive chemical element with symbol Bk and atomic number 97. It is a member of the actinide and transuranium element series. It is named after the city of Berkeley, California, the location of the University of California Radiation Laboratory where it was discovered in December 1949.

Californium

Discovered State
1950 Solid
Atomic Mass Density
251 15.1 g/L
251 98 Cf
Electrons Protons Neutrons
98 98 153
Electronic Configuration
[Rn] 5f10 7s2
  • Discovered By: Lawrence Berkeley National Laboratory
  • Appearance: silvery
  • Category: actinide
  • Melting Point: 1173 K
  • Boiling Point: 1743 K
  • Ox. State: 2, 3, 4
  • Bonding Type: metallic
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Californium is a radioactive metallic chemical element with symbol Cf and atomic number 98. The element was first made in 1950 at the University of California Radiation Laboratory in Berkeley, by bombarding curium with alpha particles (helium-4 ions). It is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium).

Einsteinium

Discovered State
1950 Solid
Atomic Mass Density
252 8.84 g/L
252 99 Es
Electrons Protons Neutrons
99 99 153
Electronic Configuration
[Rn] 5f11 7s2
  • Discovered By: Lawrence Berkeley National Laboratory
  • Appearance: silvery
  • Category: actinide
  • Melting Point: 1133 K
  • Boiling Point: 1269 K
  • Ox. State: 2, 3
  • Bonding Type: metallic
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Einsteinium is a synthetic element with symbol Es and atomic number 99. It is the seventh transuranic element, and an actinide. Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952, and named after Albert Einstein.

Fermium

Discovered State
1952 Solid
Atomic Mass Density
257 g/L
257 100 Fm
Electrons Protons Neutrons
100 100 157
Electronic Configuration
[Rn] 5f12 7s2
  • Discovered By: Lawrence Berkeley National Laboratory
  • Appearance:
  • Category: actinide
  • Melting Point: 1800 K
  • Boiling Point: K
  • Ox. State: 2, 3
  • Bonding Type:
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Fermium is a synthetic element with symbol Fm and atomic number 100. It is a member of the actinide series. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not yet been prepared.

Mendelevium

Discovered State
1955 Solid
Atomic Mass Density
258 g/L
258 101 Md
Electrons Protons Neutrons
101 101 157
Electronic Configuration
[Rn] 5f13 7s2
  • Discovered By: Lawrence Berkeley National Laboratory
  • Appearance:
  • Category: actinide
  • Melting Point: 1100 K
  • Boiling Point: K
  • Ox. State: 2, 3
  • Bonding Type:
  • Electronegativity: 1.3
  • Wiki Link: Source Link
  • Element Image: Image Link

Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate actinide and the ninth transuranic element.

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