Mercury vs Roentgenium
| Property | Hg Mercury | Rg Roentgenium |
|---|---|---|
| Atomic number | 80 | 111 |
| Symbol | Hg | Rg |
| Name | Mercury | Roentgenium |
| Category | transition-metal | transition-metal |
| Standard Atomic Weight | 200.592 u | 281 u |
| Period | 6 | 7 |
| Group | 12 | 11 |
| Block | s | s |
| Phase at STP | liquid | N/A |
| Electron configuration | [Xe]6s24f145d10 | [Rn] 7s2 5f14 6d9(predicted) |
| Oxidation states | [-2, 1, 2] | [-1, 1, 3, 5] |
| Electronegativity (Pauling) | 2 | N/A |
| Electron affinity | -0.5 eV | 1.6 eV |
| Density | 1.353360e+4 kg/m³ | 2.870000e+4 kg/m³ |
| Melting point | -38.83 °C | -273.15 °C |
| Boiling point | 356.73 °C | -273.15 °C |
| Discovery year | N/A | 1994 |