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Question

For angular momentum quantum number (l) = 3, the total number of integer values of magnetic quantum number (ml) will be:
  1. 3
  2. 7
  3. 5
  4. 9


Solution

The correct option is B 7
For certain value of l there are (2l+1) interger values of magnetic quantum number (ml) as follows -l, (-l+1)..., -1, 0, 1,....(+l-1), +l.

l represents angular momentum quantum number.
For l = 3, integer values of magnetic quantum number will be -3, -2, -1, 0, +1, +2 and +3.

The total number of integer values of magnetic quantum number = 2×(3)+1 = 7.

 

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