alleryWhich set of quantum numbers $(n, l, m_l, m_s)$ is **NOT** allowed?
A$(3, 2, -2, -1/2)$
B$(4, 0, 0, +1/2)$
C$(2, 1, 0, +1/2)$
D$(1, 1, 0, +1/2)$
Answer & Solution
Correct answer: D. $(1, 1, 0, +1/2)$
For $n=1$, $l$ can only be $0$, not $1$.
**So $(1, 1, 0, +1/2)$ violates $l \le n-1$.**
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