Nitrogen (N)
Element 7 Ā· Reactive nonmetal
Nitrogen (N) is a chemical element with atomic number 7. It is classified as a reactive nonmetal in period 2, group 15 of the periodic table (the p-block). Its standard atomic weight is 14.007 u and its ground-state electron configuration is [He] 2sĀ² 2pĀ³.
Nitrogen facts
| Atomic number (Z) | 7 |
|---|---|
| Symbol | N |
| Standard atomic weight | 14.007 u |
| Category | Reactive nonmetal |
| Group | 15 |
| Period | 2 |
| Block | p-block |
| Electron configuration | [He] 2sĀ² 2pĀ³ |
| Electronegativity (Pauling) | 3.04 |
| State at 20 Ā°C | Gas |
| Protons / electrons | 7 / 7 |
| Neutrons (most common isotope, approx.) | 7 |
| Molar mass | 14.007 g/mol |