Number of subshells in shell with n = 3:
A2
B9
C3 (s, p, d)
D1
Answer & Solution
Correct answer: C. 3 (s, p, d)
l ranges 0 to n-1 = 0, 1, 2: that's 3 values (s, p, d). So 3 subshells. Total orbitals: 1 + 3 + 5 = 9. Total electrons: 18.
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