Arsenic vs Radon
| Property | As Arsenic | Rn Radon |
|---|---|---|
| Atomic number | 33 | 86 |
| Symbol | As | Rn |
| Name | Arsenic | Radon |
| Category | metalloid | noble-gas |
| Standard Atomic Weight | 74.921595 u | 222 u |
| Period | 4 | 6 |
| Group | 15 | 18 |
| Block | p | p |
| Phase at STP | solid | gas |
| Electron configuration | [Ar]4s23d104p3 | [Xe]6s24f145d106p6 |
| Oxidation states | [-3, -2, -1, 0, 1, 2, 3, 4, 5] | [0, 2, 6] |
| Electronegativity (Pauling) | 2.18 | N/A |
| Electron affinity | 0.81 eV | -0.7 eV |
| Density | 5776 kg/m³ | 9.73 kg/m³ |
| Melting point | 816.85 °C | -71.15 °C |
| Boiling point | 613.85 °C | -61.7 °C |
| Discovery year | 1250 | 1900 |