How many electrons can an atom have in its first electron shell (n = 1)?

• A. 6
• B. 8
• C. 2
• D. 4

Answer: (C)

Verified step by step guidance

1. Understand that the first electron shell corresponds to the principal quantum number \(n = 1\).
2. Recall that the number of electrons a shell can hold is given by the formula \$2n^2$, where $n$ is the principal quantum number.
3. Substitute \(n = 1\) into the formula: \(2 \times (1)^2 = 2\).
4. Interpret this result to mean that the first shell can hold a maximum of 2 electrons.
5. Therefore, the correct answer is that the first electron shell can have 2 electrons.