51Solid
Sb 121.76 Atomic mass · uMetalloids
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.
Discovery Ancient (unknown, before 3000 BC)
K2L8M18N18O5
Physical properties
Values for the element in its standard state.
- Density
- 6.697g/cm³
- Melting point
- 904K
- Boiling point
- 1,860K
- Atomic radius
- 138pm
- Bonding type
- Metallic
- Molar heat
- 25.23J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 3 electrons;
[Kr] represents 36 core electrons. The full view shows them explicitly.
51 electrons Orbital order preserved from source
- Electronegativity
- 2.05Pauling scale
- First ionization energy
- 834kJ/mol
- Electron affinity
- 103kJ/mol
- Van der Waals radius
- Not available
Sb AntimonyAtomic number 51
834kJ/mol
Atomic numberGaps indicate unavailable data
About antimony
- Appearance
- Silvery lustrous gray
- Discovery
- Ancient (unknown, before 3000 BC)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.