Phosphorus vs Roentgenium
| Property | P Phosphorus | Rg Roentgenium |
|---|---|---|
| Atomic number | 15 | 111 |
| Symbol | P | Rg |
| Name | Phosphorus | Roentgenium |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 30.973762 u | 281 u |
| Period | 3 | 7 |
| Group | 15 | 11 |
| Block | p | s |
| Phase at STP | solid | N/A |
| Electron configuration | [Ne]3s23p3 | [Rn] 7s2 5f14 6d9(predicted) |
| Oxidation states | [-3, -2, -1, 0, 1, 2, 3, 4, 5] | [-1, 1, 3, 5] |
| Electronegativity (Pauling) | 2.19 | N/A |
| Electron affinity | 0.7466 eV | 1.6 eV |
| Density | 1820 kg/m³ | 2.870000e+4 kg/m³ |
| Melting point | 44.15 °C | -273.15 °C |
| Boiling point | 280.5 °C | -273.15 °C |
| Discovery year | 1669 | 1994 |