Sodium vs Chlorine
Pick up to 3 elements and see how they stack up.
| Property | Sodium | Chlorine |
|---|---|---|
| Atomic number | 11 | 17 |
| Atomic mass | 22.99 | 35.45 |
| Electronegativity | 0.93 | 3.16 |
| Melting point | 370.94 K (97.8 °C) | 171.6 K (-101.5 °C) |
| Boiling point | 1,156.09 K (882.9 °C) | 239.11 K (-34 °C) |
| Density | 0.968 g/cm³ | 3.214 g/L |
| Atomic radius | 227 pm | 175 pm |
| Ionization energy | 5.139 eV | 12.968 eV |
| Discovered | 1807 | 1774 |
| Category | Alkali metal | Halogen |
| State at room temp. | Solid | Gas |
| Block | s | p |
| Group | 1 | 17 |
| Period | 3 | 3 |
| Valence electrons | 1 | 7 |
| Common charges | +1 | −1 |
| Electron configuration | [Ne] 3s1 | [Ne] 3s2 3p5 |