Question

15. The electronic configuration of the atom having maximum difference in first and
second ionisation energies is
a) 1s2, 2s2, 2p6, 3s1
b) 152, 252, 2p6, 3s
c) 1s2, 2s2, 2p6, 382, 382, 3p6, 4s
d) 152, 252, 2p6, 382, 3p!​

Answer 1

Answer:

The difference between IE1 and IE2 will be maximum for the case where there is a fully filled orbital. In this case, option A has attained noble gas configuration after the loss of an electron. Hence option A has the maximum difference between IE1 and IE2.