Which of the following electronic configuration represents a sudden large gap between the values of second and third ionisation energies of an element?

Options

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

Answer

D