Aluminum vs Roentgenium
| Property | Al Aluminum | Rg Roentgenium |
|---|---|---|
| Atomic number | 13 | 111 |
| Symbol | Al | Rg |
| Name | Aluminum | Roentgenium |
| Category | post-transition-metal | transition-metal |
| Standard Atomic Weight | 26.981538 u | 281 u |
| Period | 3 | 7 |
| Group | 13 | 11 |
| Block | p | s |
| Phase at STP | solid | N/A |
| Electron configuration | [Ne]3s23p1 | [Rn] 7s2 5f14 6d9(predicted) |
| Oxidation states | [-2, -1, 0, 1, 2, 3] | [-1, 1, 3, 5] |
| Electronegativity (Pauling) | 1.61 | N/A |
| Electron affinity | 0.4328 eV | 1.6 eV |
| Density | 2700 kg/m³ | 2.870000e+4 kg/m³ |
| Melting point | 660.287 °C | -273.15 °C |
| Boiling point | 2518.85 °C | -273.15 °C |
| Discovery year | 1825 | 1994 |