Which one of the following elements has the highest ionisation energy?

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^(2)`

Answer

B

Explanation

Half - filled orbitals have stable configuration and thus required high `IE`.