51 · Sb
Antimony
Known since antiquity, with no discovery year.
Identity
- Atomic number
- 51
- Symbol
- Sb
- Canonical name
- Antimony
- Category
- metalloid
- Group
- 15
- Period
- 5
- Block
- p
- Other names
- stibium
Properties
These quantities come from the Periodic Table JSON compilation. They have not yet been checked, one by one, against CIAAW atomic weights or NIST measurements. A value marked estimated is not a measurement.
- Atomic mass
- 121.7601 u
- Electron configuration
- [Kr] 4d10 5s2 5p3
- Electrons per shell
- 2, 8, 18, 18, 5
- Standard state
- solid
- Density
- 6.697 g/cm³
- Melting point
- 903.78 K
- Boiling point
- 1,908 K
- Electronegativity
- 2.05 Pauling
- First ionization energy
- 834 kJ/mol
- Electron affinity
- 101.059 kJ/mol
History
Antiquity
Metallic antimony and stibnite were known in antiquity. No discovery year can be assigned.
Etymology
- Theme
- mineral
- Language
- grec
- Root
- stimmi
- Meaning
- stibnite