Question

What is the outer energy level and sublevel used in the electron configuration for potassium?

Select one:
a. 4s
b. 3s
c. 3p
d. 4p

Answer 1

a. 4s

Step-by-step explanation:

The outer energy level and sublevel used in the electron configuration for potassium is the 4s sub-level.

Potassium has 19 electrons.

The electronic configuration of this chemical element is:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

The outermost energy level is the 4s