Chlorine vs Polonium
| Property | Cl Chlorine | Po Polonium |
|---|---|---|
| Atomic number | 17 | 84 |
| Symbol | Cl | Po |
| Name | Chlorine | Polonium |
| Category | halogen | metalloid |
| Standard Atomic Weight | 35.4515 u | 209 u |
| Period | 3 | 6 |
| Group | 17 | 16 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p5 | [Xe]6s24f145d106p4 |
| Oxidation states | [-1, 1, 2, 3, 4, 5, 6, 7] | [-2, 2, 4, 5, 6] |
| Electronegativity (Pauling) | 3.16 | 2 |
| Electron affinity | 3.6127 eV | 1.9 eV |
| Density | 3.214 kg/m³ | 9320 kg/m³ |
| Melting point | -101.5 °C | 253.85 °C |
| Boiling point | -34.04 °C | 961.85 °C |
| Discovery year | 1774 | 1898 |