In which of the following arrangements, the order is according to the property indicated against it?

Options

A. `Li lt Na lt K lt Rb` (metallic radius)
B. `B lt C lt N lt O` (ionization enthalpy)
C. `I lt Br lt F lt C1`(electron gain enthalpy)
D. `A1^(3+) lt Mg^(2+) lt Na^(+) lt F^(-)` (ionic radius)

Answer

B

Explanation

Nitrogen has higher ionization enthalphy relative to oxygen because of the extra stability of excatly half-full `p`-subshell.