Cesium vs Nihonium
| Property | Cs Cesium | Nh Nihonium |
|---|---|---|
| Atomic number | 55 | 113 |
| Symbol | Cs | Nh |
| Name | Cesium | Nihonium |
| Category | alkali-metal | post-transition-metal |
| Standard Atomic Weight | 132.905452 u | 286 u |
| Period | 6 | 7 |
| Group | 1 | 13 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s1 | [Rn] 5f14 6d10 7s2 7p1(predicted) |
| Oxidation states | [-1, 1] | N/A |
| Electronegativity (Pauling) | 0.79 | N/A |
| Electron affinity | 0.4716 eV | 0.6 eV |
| Density | 1930 kg/m³ | 1.600000e+4 kg/m³ |
| Melting point | 28.44 °C | 426.85 °C |
| Boiling point | 670.85 °C | 1156.85 °C |
| Discovery year | 1860 | 2004 |