Cesium vs Copernicium
| Property | Cs Cesium | Cn Copernicium |
|---|---|---|
| Atomic number | 55 | 112 |
| Symbol | Cs | Cn |
| Name | Cesium | Copernicium |
| Category | alkali-metal | transition-metal |
| Standard Atomic Weight | 132.905452 u | 285 u |
| Period | 6 | 7 |
| Group | 1 | 12 |
| Block | s | s |
| Phase at STP | solid | gas |
| Electron configuration | [Xe]6s1 | [Rn] 7s2 5f14 6d10(predicted) |
| Oxidation states | [-1, 1] | [2, 4] |
| Electronegativity (Pauling) | 0.79 | N/A |
| Electron affinity | 0.4716 eV | -0.8 eV |
| Density | 1930 kg/m³ | 1.400000e+4 kg/m³ |
| Melting point | 28.44 °C | -273.15 °C |
| Boiling point | 670.85 °C | -165.15 °C |
| Discovery year | 1860 | 1996 |