Sodium vs Potassium
Pick up to 3 elements and see how they stack up.
| Property | Sodium | Potassium |
|---|---|---|
| Atomic number | 11 | 19 |
| Atomic mass | 22.99 | 39.098 |
| Electronegativity | 0.93 | 0.82 |
| Melting point | 370.94 K (97.8 °C) | 336.7 K (63.6 °C) |
| Boiling point | 1,156.09 K (882.9 °C) | 1,032 K (758.8 °C) |
| Density | 0.968 g/cm³ | 0.862 g/cm³ |
| Atomic radius | 227 pm | 275 pm |
| Ionization energy | 5.139 eV | 4.341 eV |
| Discovered | 1807 | 1807 |
| Category | Alkali metal | Alkali metal |
| State at room temp. | Solid | Solid |
| Block | s | s |
| Group | 1 | 1 |
| Period | 3 | 4 |
| Valence electrons | 1 | 1 |
| Common charges | +1 | +1 |
| Electron configuration | [Ne] 3s1 | [Ar] 4s1 |