What is the chemical formula for nitrogen?

The chemical symbol for nitrogen is N. The chemical formula for nitrogen gas is $\text{N"_2}$.
The chemical formula for nitrogen gas is $\text{N"_2}$. Nitrogen gas is one of the diatomic elements, in which one molecule consists of two atoms of the same element bonded by one or more covalent bonds. In the case of $\text{N"_2}$, the two nitrogen atoms are bonded by a triple covalent bond.