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Nitrogen
Reactive nonmetals · Group 15 · Period 2
Atomic properties
| Atomic number | 7 |
|---|---|
| Symbol | N |
| Standard atomic weight | 14.007 |
| Classification | Reactive nonmetals |
| Group | 15 |
| Period | 2 |
| Block | p-block |
| Electron configuration | [He] 2s2 2p3 |
| Electronegativity (Pauling) | 3.04 |
| Common oxidation states | +5, +3, -3 |
Physical properties
| Phase at 20 °C | Gas |
|---|---|
| Density | 0.001251 g/cm³ |
| Melting point | -210.0 °C |
| Boiling point | -195.79 °C |
| Discovered | 1772 |
| CAS number | — |