Nitrogen is a chemical element with symbol N and atomic number 7. Nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.09% by volume of Earth's atmosphere. The element nitrogen was discovered as a separable component of air, by Scottish physician Daniel Rutherford, in 1772. It belongs to the pnictogen family.Symbol: N
Atomic number: 7
Electron configuration: 1s2 2s2 2p3
Boiling point: -195.8 °C
Atomic mass: 14.0067 ± 0.0001 u
Discoverers: Daniel Rutherford