The electronic configuration of elements A,B and C are [He]2s1 ,[Ne]3s1 and [Ar]4s1 respectively .Which one of the following order is correct for IE1(in kJmol−1) of A,B and C ?

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A > B > C

C > B > A

B > C > A

C > A > B

answer is A.

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Detailed Solution

Ionization enthalpy decreases on moving top to bottom in a group

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