How many electrons can occupy the second energy level (n = 2) of an atom?

• A. 6
• B. 8
• C. 18
• D. 2

Answer: (B)

Verified step by step guidance

1. Recall that the maximum number of electrons in any energy level (shell) is given by the formula \$2n^2\(, where \)n$ is the principal quantum number (energy level).
2. Identify the principal quantum number for the second energy level: \(n = 2\).
3. Substitute \(n = 2\) into the formula: \$2 \times (2)^2$.
4. Calculate the value inside the parentheses first: \((2)^2 = 4\).
5. Multiply by 2 to find the maximum number of electrons: \$2 \times 4 = 8$ electrons can occupy the second energy level.