From the ground state electronic configurartion of the elements given below, pick up the one with highest value of second ionization energy:

Options

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

Answer

B

Explanation

`1s^(2), 2s^(2), 2p^(6), 3s^(1) underset(IE_(1))overset(-e )to underset("noble gas "e^(-1) "configuration (most stable)") overset(1s^(2), 2s^(2)2p^(6))to underset(IE_(2))overset(-e ) to `