Arsenic vs Polonium
| Property | As Arsenic | Po Polonium |
|---|---|---|
| Atomic number | 33 | 84 |
| Symbol | As | Po |
| Name | Arsenic | Polonium |
| Category | metalloid | metalloid |
| Standard Atomic Weight | 74.921595 u | 209 u |
| Period | 4 | 6 |
| Group | 15 | 16 |
| Block | p | p |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s23d104p3 | [Xe]6s24f145d106p4 |
| Oxidation states | [-3, -2, -1, 0, 1, 2, 3, 4, 5] | [-2, 2, 4, 5, 6] |
| Electronegativity (Pauling) | 2.18 | 2 |
| Electron affinity | 0.81 eV | 1.9 eV |
| Density | 5776 kg/m³ | 9320 kg/m³ |
| Melting point | 816.85 °C | 253.85 °C |
| Boiling point | 613.85 °C | 961.85 °C |
| Discovery year | 1250 | 1898 |