Radon vs Californium
| Property | Rn Radon | Cf Californium |
|---|---|---|
| Atomic number | 86 | 98 |
| Symbol | Rn | Cf |
| Name | Radon | Californium |
| Category | noble-gas | actinide |
| Standard Atomic Weight | 222 u | 251 u |
| Period | 6 | 7 |
| Group | 18 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Xe]6s24f145d106p6 | [Rn]7s25f10 |
| Oxidation states | [0, 2, 6] | [2, 3, 4, 5] |
| Electronegativity (Pauling) | N/A | 1.3 |
| Electron affinity | -0.7 eV | -0.5 eV |
| Density | 9.73 kg/m³ | 1.510000e+4 kg/m³ |
| Melting point | -71.15 °C | 899.85 °C |
| Boiling point | -61.7 °C | -273.15 °C |
| Discovery year | 1900 | 1950 |