From the ground state electronic configuration of the elements given below, pick up the one with the highest value of second ionisation energies

Options

A. `1s^(2)2s^(2)2p^(6) 3s^(2)`
B. `1s^(2)2s^(2)2p^(6)`
C. `1s^(2)2s^(2)2p^(5)`
D. `1s^(2)2s^(2)2p^(6)3s^(1)`

Answer

D

Explanation

Because after the removal of first electron, it acquires stable noble gas configuration.