STANDARDChemistry-Quantum Numbers
STANDARD Chemistry Quantum Mechanics MCQ Question
Type: MCQ-conceptual-Medium
The four quantum number for the valence shell electron or last electron of sodium (Z = 11) is
A
n = 2, l = 1, m = −1, s = −1/2
B
n = 3, l = 0, m = 0, s = +1/2
C
n = 3, l = 2, m = −2, s = −1/2
D
n = 3, l = 2, m = 2, s = +1/2
Correct Answer
Option B
Detailed Explanation
Na₁₁ = 2, 8, 1 = 1s², 2s²2p⁶, 3s¹. n = 3, l = 0, m = 0, s = +1/2.
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