Lanthanum vs Polonium
| Property | La Lanthanum | Po Polonium |
|---|---|---|
| Atomic number | 57 | 84 |
| Symbol | La | Po |
| Name | Lanthanum | Polonium |
| Category | lanthanide | metalloid |
| Standard Atomic Weight | 138.90547 u | 209 u |
| Period | 6 | 6 |
| Group | N/A | 16 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s25d1 | [Xe]6s24f145d106p4 |
| Oxidation states | [0, 1, 2, 3] | [-2, 2, 4, 5, 6] |
| Electronegativity (Pauling) | 1.1 | 2 |
| Electron affinity | 0.47 eV | 1.9 eV |
| Density | 6150 kg/m³ | 9320 kg/m³ |
| Melting point | 917.85 °C | 253.85 °C |
| Boiling point | 3463.85 °C | 961.85 °C |
| Discovery year | 1839 | 1898 |