Question

In potassium, the order of energy levels is
A) 3s > 3d B) 45 < 3d C) 45 > 4p
D) 45 = 3d​

Answer 1

Explanation:

Use n+l rule

n- shell number

L - Sub shell

• lvalue
• s- 0
• p-1
• d-2
• f-3

3d = 3+2=5

4s = 4+0=4

3d has higher energy than 4s