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Question

The number of orbitals associated with quantum numbers n=5, ms=+12 is:

A
25
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B
50
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C
11
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D
15
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Solution

The correct option is A 25
n=5;l=(n1)=4; hence the possible sub-shells for n=5 are: 5s, 5p, 5d, 5f and 5g. The number of orbitals in each would be 1, 3, 5, 7 and 9, respectively and summing them up gives the answer as 25.

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