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Q.

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

A > B > C

b

C > B  > A

c

B  > C > A

d

C > A > B

answer is A.

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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 ?