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Which of the following is the correct electron configuration for a neutral iron (Fe) atom?
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10. Periodic Properties of the Elements
The Electron Configuration
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How many electrons can an atom have in its first electron shell (n = 1)?
A
6
B
8
C
2
D
4
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Understand that the first electron shell corresponds to the principal quantum number \(n = 1\).
Recall that the number of electrons a shell can hold is given by the formula \$2n^2$, where $n$ is the principal quantum number.
Substitute \(n = 1\) into the formula: \(2 \times (1)^2 = 2\).
Interpret this result to mean that the first shell can hold a maximum of 2 electrons.
Therefore, the correct answer is that the first electron shell can have 2 electrons.
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