The electronic configuration of elements A, B and C are [He]2s1,[Ne]3s1 and [Ar]4s1respectively Which one of the following order is correct for IE1(in kJ mol-1)of A, B and C?

Question

The electronic configuration of elements A, B and C are [He]2s1,[Ne]3s1 and [Ar]4s1respectively Which one of the following order is correct for IE1(in kJ mol-1)of A, B and C? (A)  A> B> C (B) C > B > A (C)  B> C> A  (D) C> A> B

Tardigrade Admin · Accepted Answer

Electronic configuration of A, B, and C suggests that these are the successive members of a similar group. Ionisation energy decreases on moving down the group. Thus, it should follow the order: A > B > C.

Q. The electronic configuration of elements A, B and C are $[He] 2 s^{1}, [N e] 3 s^{1}$ and $[A r] 4 s^{1}$ respectively Which one of the following order is correct for $I E_{1} (ink J m o l^{- 1})$ of A, B and C?

$A > B > C$

$C > B > A$

$B > C > A$

$C > A > B$

Electronic configuration of A, B, and C suggests that these are the successive members of a similar group. Ionisation energy decreases on moving down the group. Thus, it should follow the order: $A > B > C .$

Q. The electronic configuration of elements A, B and C are [He]2s1,[Ne]3s1 and [Ar]4s1respectively Which one of the following order is correct for IE1​(inkJmol−1)of A, B and C?

A>B>C

C>B>A

B>C>A

C>A>B