Question

module 4: electrons in atoms test - 11/14/2025

1. the maximum number of electrons that can occupy the third principal energy level is

32
2
18
8

Explanation:

Step1: Recall the formula for electron capacity

The formula for the maximum number of electrons in a principal energy level \(n\) is \(2n^{2}\).

Step2: Substitute \(n = 3\) into the formula

When \(n = 3\), we calculate \(2\times3^{2}=2\times9 = 18\).

Answer:

18.