Which among the group-15 elements does not exists as tetra atomic molecule ?

Options

A. Nitrogen
B. Phosphorus
C. Arsenic
D. Antimony

Answer

A

Explanation

Nitrogen due to smaller size, high ionisation energy high electronegativity and the absence of d-orbital does not exist as a tetra atomic molecule.
Nitrogen cannot form `dpi-p pi` bond due to absence of d-orbital, so it cannot expand its covalency beyond four as the heavier members of this group can.