A sudden jump between the values of second and third ionisation energies of an element is associated with configuration

A sudden jump between the values of second and third ionisation energi

1.	A sudden jump between the values of second and third ionisation energies of an element is associated with configuration
Answer» `1s^2 2s^2 2p^63s^1` `1s^2 2s^2 2p^6 3s^2 3p^1` `1s^2 2s^2 2p^6 3s^2 3p^2` `1s^2 2s^2 2p^63s^2` ANSWER :C