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NEET levelSingle correct optionDifficulty 1 of 3as120

Which set of quantum numbers $(n, l, m_{l})$ is NOT permissible for an electron?

A(3, 2, 2)
B(4, 0, 0)
C(3, 3, 0)
D(2, 1, -1)

Answer: C

Since

l \leq n - 1

,

l = 3

is impossible when

n = 3

. All other sets obey

0 \leq l \leq n - 1

and

∣ m_{l} ∣ \leq l

.

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