51
Sb
Antimony
Metalloid period 5 group 15 p-block discovered: Ancient
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 51
- Atomic mass
- 121.760 a.m.u.
- Electron configuration
- [Kr]5s2 4d10 5p3
- Electronegativity
- 2.05 on the Pauling scale
- Atomic radius
- 206 pm
- Ionization energy
- 8.64 eV
- Electron affinity
- 1.07 eV
- Oxidation states
- +5, +3, -3
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 903.78 K (630,63 °C)
- Boiling point
- 1860 K (1 586,85 °C)
- Density
- 6.685 g/cm³