1.

Which electronic configuration of an element has abnormally high difference between second and third ionization energy.a) 1s2 2s2 2p6 3s1b) 1s1 2s1 2p6 3s2 3p1 c) 1s1 2s1 2p6d) 1s2 2s2 2p6 3s2

Answer»

Correct option is c) 1s2 2s2 2p6

1s2 2s2 2p6 , the both electrons are removed from 2p so not much difference in the 2 potentials as the electrons are removed from the same subshell, same for 1s22s22p63s1,1s2 2s2 2p6 3s2 3p1 but for 1s2 2s2 2p6 3s2 the second and third election are removed from different subshells that is 3s and 2p thus the high difference will be there



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