| Symbol: | N |
| Atomic number: | 7 |
| Relative atomic mass: | 14 |
| Electronic configuration: | 1s2 2s2 2p3 |
| Molecular formula: | N2 |
| Relative molecular mass: | 28 |
| Boiling point: | 196 °C |
| Key properties | Unreactive gas, liquid nitrogen is very cold. |
| Some major uses: | Freezing food, shrink-fitting metal parts, producing chemicals safely, food packaging, manufacturing ammonia. |
| Discoverer: | Daniel Rutherford (1772) |
Nitrogen is usually stored as a liquid at very low temperatures. One volume of liquid nitrogen gives 651 volumes of gaseous nitrogen at 100,000 Pa and 0,85 °C. It would be dangerous to use liquid nitrogen without taking proper safety precautions like using special gloves, jackets and safety glasses.
