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Sodium (Na)
Atomic number 11 · alkali
| Atomic number | 11 |
|---|---|
| Atomic mass | 22.98977 u |
| Molar mass | 22.98977 g/mol |
| Category | alkali |
| Group / period / block | 1 / 3 / s |
| Electron configuration | [Ne] 3s |
| Electrons per shell | 2, 8, 1 |
| Electronegativity (Pauling) | 0.93 |
| Atomic radius | 180.0 pm |
| Density | 0.97 g/cm³ |
| First ionisation energy | 5.1391 eV |
| Melting point | 370.94 K (97.79 °C) |
| Boiling point | 1156.09 K (882.94 °C) |
| Common oxidation states | +1 |
| Abundance in Earth's crust | 23600 ppm |
Uses
Table salt, street lamps, soap
Discovery
1807, Sir Humphrey Davy