How many electrons can the first energy level (n = 1) of an atom hold?

• A. 4
• B. 6
• C. 8
• D. 2

Answer: (D)

Verified step by step guidance

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