Amongst the elements with following electronic configurations, which one may have the highest ionisation energy?

Options

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

Answer

A

Explanation

[Ne] `3s^2 3p^1` is a half filled configuration which is more stable and removal of electron from `3p^3` is more difficult than the ` 4p^3