Q. The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is
A) 5, 1, 0, +1/2
B) 5, 1, 1, +1/2
C) 6, 0, 0, +1/2
D) 5, 0, 0, +1/2
Explanation
[Solution from source] Rb (Z = 37) is [Kr] 5s¹, so the valence electron has n = 5, l = 0 (s), m = 0 and s = +½. Sets with l = 1 describe a 5p electron, and n = 6 is the wrong shell. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.