The four quantum number of the valence electron of potassium are.

Options

A. `4, 1, 0 and (1)/(2)`
B. `4, 0, 1 and (1)/(2)`
C. `4, 0, 0 and + (1)/(2)`
D. `4, 1, 1 and (1)/(2)`

Answer

C

Explanation

( c) Atomic number potassium is `19` and hence electronic configuration will be `1 s^2, 2 s^2, 2 p^6, 3 s^2, 3 p^6, 4 s^1`
Hence for `4 s^1` electron value of quantum number are
Principle quantum numbert `n = 4`
Azimuthal quantum number `l = 0`
Magnetic quantum number `m = 0`
Spin quantum number `s = + 1//2`.