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Question

Which of the following set of quantum number is not permitted? 
  1. n=3,l=2,m=2,s=+12
  2. n=3,l=2,m=2,s=0
  3. n=4,l=2,m=2,s=12
  4. n=1,l=0,m=0,s=+12


Solution

The correct option is B n=3,l=2,m=2,s=0
Principal quantum number n 
Azimuthal quantum number ranges from 0 to n1.
Magnetic quantum number ranges from l to +l.
and Spin quantum number will have a value of +12 or 12
In option (a), n = 3, l = 0,1,2 and m = 2,1,0,+1,+2 where s can have a value of +12 or 12
In option (b), n = 3, l = 0,1,2 and m = 2,1,0,+1,+2 where 's' can not have a value of 0.
In option (c), n = 4, l = 0,1,2,3 and m = 3,2,1,0,+1,+2,+3 where s can have a value of +12 or 12
In option (d), n = 1, l = 0 and m = 0 where s can have a value of +12 or 12

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