N2

Definition

N2, or Nitrogen gas, is a colorless, odorless unreactive gas that forms about 78% of the earth's atmosphere. It is a diatomic molecule, meaning it consists of two nitrogen atoms sharing three pairs of electrons.

Related terms

Nitrogen Cycle: The series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.

Nitrogen Fixation: The chemical process by which atmospheric nitrogen is assimilated into organic compounds.

Ammonia (NH3): A compound of nitrogen and hydrogen with the formula NH3. It is a colorless gas with a characteristic pungent smell.