Cesium vs Polonium
| Property | Cs Cesium | Po Polonium |
|---|---|---|
| Atomic number | 55 | 84 |
| Symbol | Cs | Po |
| Name | Cesium | Polonium |
| Category | alkali-metal | metalloid |
| Standard Atomic Weight | 132.905452 u | 209 u |
| Period | 6 | 6 |
| Group | 1 | 16 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s1 | [Xe]6s24f145d106p4 |
| Oxidation states | [-1, 1] | [-2, 2, 4, 5, 6] |
| Electronegativity (Pauling) | 0.79 | 2 |
| Electron affinity | 0.4716 eV | 1.9 eV |
| Density | 1930 kg/m³ | 9320 kg/m³ |
| Melting point | 28.44 °C | 253.85 °C |
| Boiling point | 670.85 °C | 961.85 °C |
| Discovery year | 1860 | 1898 |