Potassium vs Copernicium
| Property | K Potassium | Cn Copernicium |
|---|---|---|
| Atomic number | 19 | 112 |
| Symbol | K | Cn |
| Name | Potassium | Copernicium |
| Category | alkali-metal | transition-metal |
| Standard Atomic Weight | 39.0983 u | 285 u |
| Period | 4 | 7 |
| Group | 1 | 12 |
| Block | s | s |
| Phase at STP | solid | gas |
| Electron configuration | [Ar]4s1 | [Rn] 7s2 5f14 6d10(predicted) |
| Oxidation states | [-1, 1] | [2, 4] |
| Electronegativity (Pauling) | 0.82 | N/A |
| Electron affinity | 0.5014 eV | -0.8 eV |
| Density | 890 kg/m³ | 1.400000e+4 kg/m³ |
| Melting point | 63.38 °C | -273.15 °C |
| Boiling point | 758.85 °C | -165.15 °C |
| Discovery year | 1807 | 1996 |