Sodium |
| Symbol | Na |
|---|---|
| Latin name | Natrium |
| Atomic number | 11 |
| Period | 3 |
| Element category | Alkali metals |
| Relative atomic mass | 22.98768 |
| Group | I.A |
| Electronegativity | 0.9 |
| Oxidation numbers | 1 |
| Electron configuration | 1s2 2s2 2p6 3s1 |
| Density [g/cm3] | 0.9725 |
| State | Solid |
| Melting point [°C] | 98.81 |
| Boiling point [°C] | 882.9 |
| Critical point [°C] | 2300 |
| Critical pressure [MPa] | 35 |
| Atomic radius [pm] | 190 |
| Covalent radius [pm] | 154 |
| Thermal conductivity [W m-1K-1] | 141 |
| Heat capacity [J K-1g-1] | 1.23 |
| Discovery | 1807 |
| Hardness [Mohs scale] | 0.4 |
| Brinell hardness [MPa] | 0.69 |
| Young's modulus [GPa] | 10 |
| Electrical conductivity [S m-1] | 2.01 · 107 |
| Shear modulus [GPa] | 3.3 |
| 1.st ionization energy [eV] | 5.1391 |
| 2.nd ionization energy [eV] | 47.286 |
| 3.rd ionization energy [eV] | 71.641 |
| Stable isotopes | 1 |
| Unstable isotopes | 6 |