Amongst the following elements (where electronic configurations are given below), the one having the highest ionisation enthaipy is 'therefore' [Ne]`3s^2 3p^1`, [Ne]`3 s^2 3 p^3`, [Ne] `3 s^2 3 p^2`, [Ne] `3d^10 4 s^2 4 p^2`

Options

A. `[Ne] 3s^2 3p^1`
B. `[Ne] 3s^2 3p^3`
C. `[Ne] 3s^2 3p^2`
D. `[Ar] 3d^10 4s^2 4p^3`

Answer

B

Explanation

The highest E is of (Ne) `3s^2 3p^3` due to half filled p-subshell which has extra stability.