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The electrons identifted by quantum nym...

The electrons identifted by quantum nymbers ( n) and (l) :
can be placed in order fo increasing enrgy as :

A

` (4) lt (2) lt (3) lt (1)`

B

`(2) gt (40) gt (1) gt(3)`

C

`(1) gt (3) lt (2) lt(4)`

D

`(3) lt (4) lt (2) lt (1)`

Text Solution

Verified by Experts

The correct Answer is:
A
(1) `n=4, l=1 rArr 4p`
(2) ` n=4, l=0 rArr 2s`
(3) ` n=3 , l=2 rArr 3d`
(4) ` n=3 , l=1 rArr 3p`.
Increasing order of energy is
` 3 p lt 4 s lt 3d lt 4 p`
` (4) lt (2) lt (3) lt (1)` .
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