51 Sb
Metalloid
Antimony
Used in flame retardants.
Properties of Antimony
- Atomic number (Z)
- 51
- Symbol
- Sb
- Atomic mass
- 121.76 g/mol
- Category
- Metalloid
- Group
- 15
- Period
- 5
- Electron configuration
- [Kr] 4d¹⁰ 5s² 5p³
- Electronegativity (Pauling)
- 2.05
- Atomic radius
- 133 pm
- First ionization energy
- 834 kJ/mol
- Melting point
- 903.78 K (630.6 °C)
- Boiling point
- 1860 K (1586.8 °C)
- Density
- 6.685 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Known since ancient times
Frequently asked questions
What is Antimony?
Antimony (Sb) is a metalloid, element number 51 on the periodic table. Used in flame retardants.
What is the atomic number and atomic mass of Antimony?
Antimony has atomic number 51 and an atomic mass of about 121.76 g/mol.
What is the electron configuration of Antimony?
The electron configuration of Antimony is [Kr] 4d¹⁰ 5s² 5p³.
Where is Antimony on the periodic table?
Antimony sits in group 15, period 5, and is classified as a metalloid.