11 Na
Alkali metal
Sodium
Component of table salt.
Properties of Sodium
- Atomic number (Z)
- 11
- Symbol
- Na
- Atomic mass
- 22.99 g/mol
- Category
- Alkali metal
- Group
- 1
- Period
- 3
- Electron configuration
- [Ne] 3s¹
- Electronegativity (Pauling)
- 0.93
- Atomic radius
- 190 pm
- First ionization energy
- 496 kJ/mol
- Melting point
- 370.87 K (97.7 °C)
- Boiling point
- 1156 K (882.9 °C)
- Density
- 0.971 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1807