The total values of $m$ for each orbital in $M$ shell are :

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Solution

The correct option is B 9
For M shell, $n = 3, l = 0, 1, 2$
For $l = 0, m = 0$
For $l = 1, m = + 1, 0, - 1$
For $l = 2, m = + 2, + 1, 0, - 1, - 2$
Hence, the total values of m for each orbital in M shell are $1 + 3 + 5 = 9$

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