Which of the following represents the correct set of the four quantum numbers of $4 d -$ electrons?

4, 3, 2, + \frac{1}{2}

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4, 2, 1, 0

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4, 3, - 2, \frac{1}{2}

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4, 2, 1, - \frac{1}{2}

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Solution

The correct option is D $4, 2, 1, - \frac{1}{2}$
$n = 4; l = 0, 1, 2, 3$
$l = 2 ∵ (d - o r b i t a l)$
$m = - 1 t o 1; s = - \frac{1}{2} o r \frac{1}{2}$

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