Oxygen vs Polonium
| Property | O Oxygen | Po Polonium |
|---|---|---|
| Atomic number | 8 | 84 |
| Symbol | O | Po |
| Name | Oxygen | Polonium |
| Category | nonmetal | metalloid |
| Standard Atomic Weight | 15.9994 u | 209 u |
| Period | 2 | 6 |
| Group | 16 | 16 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p4 | [Xe]6s24f145d106p4 |
| Oxidation states | [-2, -1, 0, 1, 2] | [-2, 2, 4, 5, 6] |
| Electronegativity (Pauling) | 3.44 | 2 |
| Electron affinity | 1.4611 eV | 1.9 eV |
| Density | 1.429 kg/m³ | 9320 kg/m³ |
| Melting point | -218.79 °C | 253.85 °C |
| Boiling point | -182.95 °C | 961.85 °C |
| Discovery year | 1771 | 1898 |