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The electronic configuration of an eleme...

The electronic configuration of an element with the largest difference between the `1^(st) and 2^(nd)` ionization energies is

A

`1s^2 2s^2 2p^6`

B

`1s^2 2s^2 2p^6 3s^1`

C

`1s^2 2s^2 2p^6 3s^2`

D

`1s^2 2s^2 2p^1`

Text Solution

Verified by Experts

The correct Answer is:
B
Largest difference between `1st and 2nd ` IE
Abnormal jump in I. E. is normally observed when we break into an inner shell
Hence for
`m larr 1s^2 2s^2 2p^6 3s^1 to IE`

(Electron to be removed from 2p )
Hence `IE_2 gt gt IE_1`.
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