« back

51 - Antimony metalloid

Discovered by before 3000 BC in ~1600 BC

Antimony

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.
Shell Electrons Orbitals
1 2 2 in 1s
2 8 2 in 2s + 6 in 2p
3 18 2 in 3s + 6 in 3p + 10 in 3d
4 18 2 in 4s + 6 in 4p + 10 in 4d
5 5 2 in 5s + 3 in 5p
AntimonySb Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5
121.76  u Atomic Mass
1.5  Å Atomic Radius
1860  K Boiling Point
1.39  Å Covalent Radius
6.7  g/cm³ Density
101.06 Electron Affinity
2.05 Electronegativity
8.61  eV First Ionization Energy
904.05  K Melting Point
5 Number of Shells
5 Electron Valency
51 Atomic Number
2, 8, 18, 18, 5 Electron Shell Occupations
0.21  J/(g K) Specific Heat