lonisation energy is highest in

Options

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

Answer

B

Explanation

Among the given configurations `IE_(1)` is highest for `[Ne]3s^(2)2p^(3)` due to half filled 3p-orbitals