Properties of bonds in nitrogen The nitrogen molecule contributes to bonding by three pairs of electrons, forming two π bonds and one σ bond. There is no contribution to bonding, and bonding and antibonding energies approximately cancel out, and they are equivalent to lone electron pairs. Due to the presence of three bonds N≡N in the N2 molecule, the N2 molecule is very stable, and its decomposition into atoms requires 941.69kJ/mol of energy. N2 is the most stable diatomic molecule known, with a relative molecular mass of 28. Nitrogen is generally not flammable and does not support combustion. The chemical formula is N2.