Which set of quantum numbers (n, l, m, s) is NOT allowed for an electron?

1. A Option A: n = 2, l = 2, m = 0, s = +½
2. B Option B: n = 3, l = 2, m = −2, s = +½
3. C Option C: n = 2, l = 1, m = 0, s = −½
4. D Option D: n = 1, l = 0, m = 0, s = +½

Answer checked 11 October 2026 · How we write and check questions