Formation of N, molecule (Valence Bond theory) :
1. 7N has electronic configuration 1s2 2s2 2px1 2py1 2pz.
2. Suppose that px orbital of one ‘N’ atom overlaps the ‘px‘ orbital of the other ‘N’ atom giving σ px – px bond along the inter – nuclear axis.
3. The py and pz orbitals of one ‘N’ atom overlap the py and pz orbital of other ‘N’ atom laterally, respectively perpendicular to inter – nuclear axis giving π py – py and π pz -pz bonds.
4. Therefore, N2 molecule has a triple bond between two nitrogen atoms.
