Question

How many electrons in ₁₉K have n = 3, l = 1?

Options

• 1

• 2

• 4

• 6

Answer 1

6

Explanation:

n = 3, l = 1 refer to 3p subshell.

The electronic configuration of ₁₉K is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹.

Therefore, ₁₉K has 6 electrons with n = 3, l = 1.