The electrons identified by quantum numbers `n` and `l` : (a) `n=5, l=1` , (b) `n=5, l=0` (c ) `n=4, l=2` , (d) `n=4, l=1` can be placed in order of increasing energy as :
A
`(c )lt(d)lt(b)lt(a)`
B
`(d)lt(b)lt(c )lt(a)`
C
`(b)lt(d)lt(a)lt(c )`
D
`(a)lt(c )lt(b)lt(d)`
Text Solution
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The correct Answer is:
B
The electrons identified ………… (a) `5p` , (b) `5s` (c ) `4d` , (d) `4p` Acc. to `(n+l)` rule, increasing order of energy `(d)lt(b)lt(c )lt(a)`
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