1.

Which of the following sets of quantum numbers is not allowed

Answer»

`n=1, l=0 , m=0 ,`s=+1/2`
`n=1, l=1 , m=0 ,`s=-1/2`
`n=2, l=1 , m=1 ,`s=+1/2`
`n=2, l=1 , m=0 ,`s=-1/2`

ANSWER :B


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