Question

Write the reason for the anomalous behaviour of Nitrogen.

Answer 1

1. Due to its small size, high electronegativity, high ionisation enthalpy and absence of d-orbitals.
2. N has a unique ability to form pπ – pπ multiple bonds whereas the heavier members of this group (15) do not form pπ – pπ bond because their atomic orbitals are so large and diffused that they cannot have effective overlapping.
3. Nitrogen exists as a diatomic molecule with a triple bond between the two atoms whereas other elements form a single bond in the elemental state.
4. N cannot form dπ – pπ bond due to the absence of d-orbitals whereas other elements can.