| General |
|---|
| Name | Nitrogen | | Symbol | N | | Number | 7 | | Chemical series | Other nonmetals | | Group / Period | 15 / 2 | | Block | p-block | | CAS registry number | 7727-37-9 |
| Physical properties |
|---|
| State | gas | | Density | 1.251 g/L | | Melting point | 63.15 K (-210.00 °C, -346.00 °F) | | Boiling point | 77.36 K (-195.79 °C, -320.42 °F) | | Critical point | 126.21 K, 3.39 MPa |
| Atomic properties |
|---|
| Atomic Weight | 14.007 g/mol | | Crystal structure | hexagonal | | Electronegativity | 3.04 | | Atomic radius | 65 pm | | Atomic radius (calculated) | 56 pm | | Electron configuration | [He] 2s2 2p3 | | Electrons per shell | 2, 5 | | Number of protons | 7 | | Number of neutrons | 6 |
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Oxygen