Antimony

Symbol | Sb
Latin name | Stibium
Atomic number | 51
Period | 5
Element category | Metalloids
Relative atomic mass | 121.75
Group | V.A
Electronegativity | 1.9
Oxidation numbers | -3, 3, 5
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p3
Density [g/cm3] | 7.29
State | Solid
Melting point [°C] | 630.74
Boiling point [°C] | 1750
Atomic radius [pm] | 133
Covalent radius [pm] | 138
Thermal conductivity [W m-1K-1] | 24.3
Heat capacity [J K-1g-1] | 0.207
Discovery | 1450
Hardness [Mohs scale] | 3-3.5
Brinell hardness [MPa] | 294
Young's modulus [GPa] | 55
Electrical conductivity [S m-1] | 2.5 · 106
Shear modulus [GPa] | 20
1.st ionization energy [eV] | 8.64
2.nd ionization energy [eV] | 16.53
3.rd ionization energy [eV] | 25.3
Stable isotopes | 2
Unstable isotopes | 27