Multiple Choice
Which of the following best defines the ground state of an atom?
4
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10. Periodic Properties of the Elements
The Electron Configuration
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many electrons can the third energy level (n = 3) hold in an atom?
A
6
B
32
C
18
D
8
Verified step by step guidance1
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).
Identify the principal quantum number for the third energy level: $n = 3$.
Substitute $n = 3$ into the formula: $2 \times (3)^2$.
Calculate the square of 3: $(3)^2 = 9$.
Multiply by 2 to find the maximum number of electrons: $2 \times 9 = 18$ electrons.
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