Sodium
Alkali Metal
Sodium (Na) is a chemical element with atomic number 11, classified as a alkali metal. At room temperature it is a solid. It was discovered in 1807 by Humphry Davy.
Properties
- Atomic number
- 11
- Atomic mass
- 22.99 u
- Category
- Alkali Metal
- Group
- 1
- Period
- 3
- Block
- s-block
- Electron configuration
- [Ne] 3s¹
- Phase at STP
- Solid
- Density
- 0.971 g/cm³
- Melting point
- 370.95 K (97.8 °C)
- Boiling point
- 1156 K (882.9 °C)
- Electronegativity
- 0.93
- Atomic radius
- 190 pm
- Ionization energy
- 5.139 eV
- Discovery
- 1807 · Humphry Davy
Common uses
Table salt, soap, street lighting, chemical processing
Did you know?
Reacts violently with water and is essential for nerve function in living organisms.