Nitrogen (N)
Nitrogen (N) is element 7 of the periodic table, a nonmetal in period 2 and group 15. Its standard atomic weight is 14.007, so one mole of nitrogen atoms has a mass of 14.007 g. At room temperature it is a gas; it melts at -210 °C and boils at -195.79 °C.
| Atomic number | 7 |
|---|---|
| Symbol | N |
| Standard atomic weight | 14.007 |
| Molar mass | 14.007 g/mol |
| Category | Nonmetal |
| Group | 15 |
| Period | 2 |
| Block | p-block |
| Electron configuration | [He] 2s2 2p3 |
| Oxidation states | +5, +4, +3, +2, +1, −1, −2, −3 |
| Electronegativity (Pauling) | 3.04 |
| Atomic radius (van der Waals) | 155 pm |
| First ionisation energy | 14.534 eV (1402.3 kJ/mol) |
| Electron affinity | — |
| State at room temperature | Gas |
| Melting point | 63.15 K (-210 °C) |
| Boiling point | 77.36 K (-195.79 °C) |
| Density | 1.2506 g/L |
| Discovered | 1772 |
Group 15
Calculate with Nitrogen
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.