| Potassium | |
| Elemental State | K |
| Electron Configuration | 1s22s22p63s23p64s1 |
| First Ionization Potential | 4.341 eV |
| Electron Affinity | 0.501 eV |
| Z* | 3.495 (Clementi-Raimondi) |
| Pauling Electronegativity | 0.82 |
| Covalent Radius | 1.96 Å |
| Metallic Radius | 2.35 Å |
| Ionic Radius | 1.51 Å K+ coordination number
= 4
1.52 Å K+ coordination number = 6 1.60 Å K+ coordination number = 7 1.65 Å K+ coordination number = 8 |
| van der Waal's Radius | 2.75 Å |
| Melting Point | 63.28 oC |
| Boiling Point | 759 oC |
| Density | 0.862 g/cm3 |
| Other Properties | |