Question

The correct set of four quantum numbers for the valence electrons of the rubidium atom (Z = 37) is ______.

Options

• `5,0,0,+1/2`

• `5,1,0,+1/2`

• `5,1,1,+1/2`

• `5,0,1,+1/2`

Answer 1

The correct set of four quantum numbers for the valence electrons of the rubidium atom (Z = 37) is `underlinebb (5,0,0,+1/2)`.

Explanation:

The electronic configuration of Rubidiurn (Z = 37) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 5s¹.

The last electron enters in 5s orbital.

Hence, n = 5, l = 0, m = 0, s = `±1/2`