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Electronic configuration of valence shel...

Electronic configuration of valence shell of four elements, `A,B,C` and D are?
(A) `ns^(2),np^(2)` (D) `ns^(2),np^(3)`
(B) `ns^(2),np^(4)` (D) `ns^(2),np^(5)`
Arrange them in increasing order of `IE_(2)`:

A

`A lt B lt C lt D`

B

`A lt B lt D lt C`

C

`B lt A lt D lt C`

D

`B lt A lt C lt D`

Text Solution

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The correct Answer is:
B
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