Potassium vs Cadmium
| Property | K Potassium | Cd Cadmium |
|---|---|---|
| Atomic number | 19 | 48 |
| Symbol | K | Cd |
| Name | Potassium | Cadmium |
| Category | alkali-metal | transition-metal |
| Standard Atomic Weight | 39.0983 u | 112.414 u |
| Period | 4 | 5 |
| Group | 1 | 12 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s1 | [Kr]5s24d10 |
| Oxidation states | [-1, 1] | [-2, 1, 2] |
| Electronegativity (Pauling) | 0.82 | 1.69 |
| Electron affinity | 0.5014 eV | -0.7 eV |
| Density | 890 kg/m³ | 8690 kg/m³ |
| Melting point | 63.38 °C | 321.07 °C |
| Boiling point | 758.85 °C | 766.85 °C |
| Discovery year | 1807 | 1817 |