Scelta multipla
Which of the following is the electron configuration of a neutral potassium (K) atom?
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10. Periodic Properties of the Elements
The Electron Configuration
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How many electrons can occupy the first energy level (n = 1) of an atom?
A
2
B
8
C
4
D
6
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Recall that the number of electrons that can occupy a given energy level (shell) in an atom is determined by the formula \$2n^2$, where $n$ is the principal quantum number (energy level).
Identify the principal quantum number for the first energy level, which is \(n = 1\).
Substitute \(n = 1\) into the formula: \(2 \times (1)^2\).
Calculate the value inside the parentheses first: \((1)^2 = 1\).
Multiply by 2 to find the maximum number of electrons: \(2 \times 1 = 2\) electrons can occupy the first energy level.
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