JEE Main 2024 Chemistry question
The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is:
Answer: (A)
Solution
The configuration of Rb is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s¹, so the valence electron is in 5s: n = 5, l = 0, m = 0, s = +1/2.