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Which among the following electronic configuration of an element has abnormally high difference between second and third ionization energy?
A
1s2 , 2s2 2p6 , 3s1
B
1s2 , 2s2 2p6 , 3s2 3p1
C
1s2 , 2s2 2p6 , 3s2 3p2
D
1s2 ,2s2 2p6 , 3s2
Explanation
In (4) after removing second valence electron from 3s orbital, the ion will attain stable noble gas configuration. So, removal of third electron from 2p, a large amount of energy will be required. Hence, there is an abnormally high difference between second and third ionization enthalpy.
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