The nitrite ion, ${{\mathrm{NO}}_2}^{-}$, may be represented by two major resonance forms. The lengths of the nitrogen-to-oxygen bonds in this ion are expected to be:

the same as the length of nitrogen-to-oxygen triple bonds.

the same as the length of nitrogen-to-oxygen double bonds.

between the lengths of a nitrogen-to-oxygen single bond and a nitrogen-to-oxygen double bond.

between the lengths of a nitrogen-to-oxygen double bond and a nitrogen-to-oxygen triple bond.