Platinum vs Roentgenium
| Property | Pt Platinum | Rg Roentgenium |
|---|---|---|
| Atomic number | 78 | 111 |
| Symbol | Pt | Rg |
| Name | Platinum | Roentgenium |
| Category | transition-metal | transition-metal |
| Standard Atomic Weight | 195.084 u | 281 u |
| Period | 6 | 7 |
| Group | 10 | 11 |
| Block | s | s |
| Phase at STP | solid | N/A |
| Electron configuration | [Xe]6s14f145d9 | [Rn] 7s2 5f14 6d9(predicted) |
| Oxidation states | [-3, -2, -1, 0, 1, 2, 3, 4, 5, 6] | [-1, 1, 3, 5] |
| Electronegativity (Pauling) | 2.28 | N/A |
| Electron affinity | 2.1228 eV | 1.6 eV |
| Density | 2.146000e+4 kg/m³ | 2.870000e+4 kg/m³ |
| Melting point | 1768.4 °C | -273.15 °C |
| Boiling point | 3824.85 °C | -273.15 °C |
| Discovery year | 1735 | 1994 |