Krypton vs Polonium
| Property | Kr Krypton | Po Polonium |
|---|---|---|
| Atomic number | 36 | 84 |
| Symbol | Kr | Po |
| Name | Krypton | Polonium |
| Category | noble-gas | metalloid |
| Standard Atomic Weight | 83.798 u | 209 u |
| Period | 4 | 6 |
| Group | 18 | 16 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [Ar]4s23d104p6 | [Xe]6s24f145d106p4 |
| Oxidation states | [0, 1, 2] | [-2, 2, 4, 5, 6] |
| Electronegativity (Pauling) | 3 | 2 |
| Electron affinity | -1 eV | 1.9 eV |
| Density | 3.733 kg/m³ | 9320 kg/m³ |
| Melting point | -157.36 °C | 253.85 °C |
| Boiling point | -153.42 °C | 961.85 °C |
| Discovery year | 1898 | 1898 |