11 · Na
Sodium
Isolated by electrolysis by Davy in 1807.
Identity
- Atomic number
- 11
- Symbol
- Na
- Canonical name
- Sodium
- Category
- alkali metal
- Group
- 1
- Period
- 3
- Block
- s
- Other names
- natrium
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
- 22.989769 u
- Electron configuration
- [Ne] 3s1
- Electrons per shell
- 2, 8, 1
- Standard state
- solid
- Density
- 0.968 g/cm³
- Melting point
- 370.944 K
- Boiling point
- 1,156.09 K
- Electronegativity
- 0.93 Pauling
- First ionization energy
- 495.8 kJ/mol
- Electron affinity
- 52.867 kJ/mol
Notable isotopes
This summary is not an inventory of every isotope.
- Na-23 · 100 % · stable
History
Electrolytic isolation
Isolation · confirmed · 1807
Davy isolates sodium by electrolysis of caustic soda. The soda itself was known long before.
Etymology
- Theme
- mineral
- Language
- latin médiéval
- Root
- sodanum
- Meaning
- soda; the symbol comes from natrium
Scientists
Places and institutions
- London — historical setting : United Kingdom — present country : United Kingdom
See also
Sources
- IUPAC, Periodic Table of the Elements
- Bowserinator, Periodic Table JSON. Compilation secondaire d’où viennent les grandeurs physiques importées (masse, densité, températures, énergies). Elles ne sont pas revérifiées une à une auprès du NIST ou de la CIAAW.
- John Emsley, Nature’s Building Blocks: An A–Z Guide to the Elements