If magnetic quantum number of a given atom represented by -3, then what will be its principal quantum number

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answer is C.

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Detailed Solution

If the magnetic quantum number of a given atom is represented by −3, then its principal quantum number will be 4.
For a given value of l, m=−l,....0...+l
When m=−3, l=3
For given value of n, l can have values from 0 to n-1.
When l=3, n=4 so that n−1=4−1=3

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