Cesium vs Meitnerium
| Property | Cs Cesium | Mt Meitnerium |
|---|---|---|
| Atomic number | 55 | 109 |
| Symbol | Cs | Mt |
| Name | Cesium | Meitnerium |
| Category | alkali-metal | transition-metal |
| Standard Atomic Weight | 132.905452 u | 278 u |
| Period | 6 | 7 |
| Group | 1 | 9 |
| Block | s | s |
| Phase at STP | solid | N/A |
| Electron configuration | [Xe]6s1 | [Rn]7s25f146d7(calculated) |
| Oxidation states | [-1, 1] | [1, 3, 4, 6, 8, 9] |
| Electronegativity (Pauling) | 0.79 | N/A |
| Electron affinity | 0.4716 eV | 1.7 eV |
| Density | 1930 kg/m³ | 3.740000e+4 kg/m³ |
| Melting point | 28.44 °C | -273.15 °C |
| Boiling point | 670.85 °C | -273.15 °C |
| Discovery year | 1860 | 1982 |