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Antimony (Sb)

From Wikipedia, the free encyclopediaAntimony 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.

Antimony in the periodic table

Atomic number51
Element categoryMetalloid

Physical properties

Phase at STPSolid
Density6.697 g/cm3
Atomic weight121.76 u
Melting point903.78 K
630.63 °C
1167.134 °F
Boiling point1908 K
1634.85 °C
2974.73 °F

Atomic properties

Electronegativity (Pauling Scale)2.05
Electron affinity101.059 kJ/mol
Oxidation states−3, −2, −1, 0, +1, +2, +3, +4, +5
(an amphoteric oxide)
Ionization energies
1834 kJ/mol
2 1594.9 kJ/mol
3 2440 kJ/mol
4 4260 kJ/mol
5 5400 kJ/mol
6 10400 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Kr] 4d10 5s2 5p3
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p3
Electrons per shell2, 8, 18, 18, 5


Discovered byJabir ibn Hayyan
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