STANDARDChemistry-Atomic Structure
STANDARD Chemistry Quantum Numbers MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is:
A
5, 0, 0, +1/2
B
5, 1, 0, +1/2
C
5, 1, 1, +1/2
D
5, 0, 1, +1/2
Correct Answer
Option A
Detailed Explanation
The electronic configuration of Rubidium (Rb = 37) is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s¹. Since the last electron enters in 5s orbital, hence n = 5, l = 0, m = 0, s = 1/2.
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