Which of the following electronic configuration represents a

Last updated: 7/3/2023

Which of the following electronic configuration represents a sudden large gap between the values of second and third ionisation energies of an element 1 1s 2s 2p 2 1s 2s 2p 3s 3p 3 1s 2s 2p6 3s 3p 4 1s 2s 2p6 3s