객관식
Which of the following pairs of elements have the same number of valence electrons?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
객관식
How many valence electrons are present in a neutral atom of nitrogen (N)?
A
2
B
3
C
5
D
7
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검증된 단계별 안내1
Identify the element in question, which is nitrogen (N).
Recall that the number of valence electrons corresponds to the electrons in the outermost shell of the atom.
Determine the electron configuration of nitrogen: \$1s^2 2s^2 2p^3$.
Recognize that the outermost shell for nitrogen is the second shell, which contains the \$2s$ and \$2p$ electrons.
Count the electrons in the outermost shell: \(2\) electrons in \$2s$ and \(3\) electrons in \$2p$, totaling \(5\) valence electrons.
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