Nitrogen vs Promethium
| Property | N Nitrogen | Pm Promethium |
|---|---|---|
| Atomic number | 7 | 61 |
| Symbol | N | Pm |
| Name | Nitrogen | Promethium |
| Category | nonmetal | lanthanide |
| Standard Atomic Weight | 14.006855 u | 145 u |
| Period | 2 | 6 |
| Group | 15 | N/A |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 2s2.2p3 | [Xe]6s24f5 |
| Oxidation states | [-3, -2, -1, 0, 1, 2, 3, 4, 5] | [2, 3] |
| Electronegativity (Pauling) | 3.04 | N/A |
| Electron affinity | -0.07 eV | 0.129 eV |
| Density | 1.2506 kg/m³ | 7260 kg/m³ |
| Melting point | -210 °C | 1041.85 °C |
| Boiling point | -195.79 °C | 2999.85 °C |
| Discovery year | 1772 | 1902 |