Question

The four quantum numbers of the
outermost electron of K (Z = 19) are:
O n = 2, 1 = 0, m = 0, s = +1/2
O n = 4, 1 = 0, m = 0, s = +1/2
O
n = 3,1 = 1, m = 1, s = +1/2
O , ,
n = 4,1 = 2, m = -1, s = +1/2​

Answer 1

Explanation:

Potassium(K) is a fourth period element.

So n=4.

As it is an alkali metal l=0.

Therefore m should be 0.

s=+1/2.

So the correct answer is option B