Hydrogen vs Radon
| Property | H Hydrogen | Rn Radon |
|---|---|---|
| Atomic number | 1 | 86 |
| Symbol | H | Rn |
| Name | Hydrogen | Radon |
| Category | nonmetal | noble-gas |
| Standard Atomic Weight | 1.007975 u | 222 u |
| Period | 1 | 6 |
| Group | 1 | 18 |
| Block | s | p |
| Phase at STP | gas | gas |
| Electron configuration | 1s1 | [Xe]6s24f145d106p6 |
| Oxidation states | [-1, 1] | [0, 2, 6] |
| Electronegativity (Pauling) | 2.2 | N/A |
| Electron affinity | 0.75419 eV | -0.7 eV |
| Density | 0.08988 kg/m³ | 9.73 kg/m³ |
| Melting point | -259.34 °C | -71.15 °C |
| Boiling point | -252.87 °C | -61.7 °C |
| Discovery year | 1766 | 1900 |