While phosphorus forms `PC l_(5)`, nitrogen does not form `NC l_(5)` because

Options

A. Nitrogen is more electronegative than phosphorus
B. Nitrogen atom is smaller than phosphorus
C. The ionisation energy of nitrogen is greater than that of phosphorus
D. Unlike phosphorus, nitrogen has no 'd' orbital in its valence shell

Answer

D

Explanation

Nitrogen does not form `NC l_(5)` due to the absence of d-orbital in its configuration
`""_(7)N=1s^(2),2s^(2),2p^(3),""_(15)P=1s^(2),2s^(2),2p^(6),3s^(2),3p^(3),3d^(0)`.