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The electronic configuration of element ...

The electronic configuration of element `A, B`, and `C`are `[He]2s^(1),[Ne]3s^(1)`, and `[Ar]4s^(1)`, respectively. Which one of the following order is correct for the `IE_(1) ("in" kJ mol^(-1))` of `A`,`B,` and `C`?

A

`A gt B gtC`

B

`C gt B gt A`

C

`B gt C gt A`

D

`C gt A gt C`

Text Solution

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The correct Answer is:
A
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