| Property | Value |
|---|---|
| Atomic number | 11 |
| Atomic weight | 22.989769282 amu |
| Element family | Alkali metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 23Na: 100% |
| Previous element | Neon |
| Next element | Magnesium |
| Density | 0.971 g/cm3 (STP) |
| Melting | 98 °C |
| Boiling | 892 °C |
| Covalent radius | 1.55 Å |
| Van der Waals radius | 2.27 Å |
| Ionic radius | 1.02 Å |
| Metallic radius | 1.86 Å |
| First ionization potential | 5.138 eV |
| Electron affinity | 0.548 eV |
| Electronegativity | 0.93 |
| Discovery year | 1807 |
Sodium is an element number 11 from alkali metals family. Its symbol is Na. Sodium atomic weight is 22.989769282 amu. Na stable and long lived isotopes are 23Na: 100%. Sodium electronic configuration is 1s22s22p63s1. Sample compounds that contain Sodium are NaCl, NaOH, Na2CO3, NaHCO3, Na2SO4, NaNO3.
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