Krypton vs Radon
| Property | Kr Krypton | Rn Radon |
|---|---|---|
| Atomic number | 36 | 86 |
| Symbol | Kr | Rn |
| Name | Krypton | Radon |
| Category | noble-gas | noble-gas |
| Standard Atomic Weight | 83.798 u | 222 u |
| Period | 4 | 6 |
| Group | 18 | 18 |
| Block | p | p |
| Phase at STP | gas | gas |
| Electron configuration | [Ar]4s23d104p6 | [Xe]6s24f145d106p6 |
| Oxidation states | [0, 1, 2] | [0, 2, 6] |
| Electronegativity (Pauling) | 3 | N/A |
| Electron affinity | -1 eV | -0.7 eV |
| Density | 3.733 kg/m³ | 9.73 kg/m³ |
| Melting point | -157.36 °C | -71.15 °C |
| Boiling point | -153.42 °C | -61.7 °C |
| Discovery year | 1898 | 1900 |