Chlorine vs Potassium
Pick up to 3 elements and see how they stack up.
| Property | Chlorine | Potassium |
|---|---|---|
| Atomic number | 17 | 19 |
| Atomic mass | 35.45 | 39.098 |
| Electronegativity | 3.16 | 0.82 |
| Melting point | 171.6 K (-101.5 °C) | 336.7 K (63.6 °C) |
| Boiling point | 239.11 K (-34 °C) | 1,032 K (758.8 °C) |
| Density | 3.214 g/L | 0.862 g/cm³ |
| Atomic radius | 175 pm | 275 pm |
| Ionization energy | 12.968 eV | 4.341 eV |
| Discovered | 1774 | 1807 |
| Category | Halogen | Alkali metal |
| State at room temp. | Gas | Solid |
| Block | p | s |
| Group | 17 | 1 |
| Period | 3 | 4 |
| Valence electrons | 7 | 1 |
| Common charges | −1 | +1 |
| Electron configuration | [Ne] 3s2 3p5 | [Ar] 4s1 |