객관식
Halogens are elements found in Group 17 of the periodic table. How many valence electrons does a halogen atom typically possess?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
How many valence electrons does an atom of nitrogen (N) have?
A
5
B
2
C
3
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 an atom.
Determine the electron configuration of nitrogen: \$1s^2 2s^2 2p^3$.
Focus on the electrons in the second shell (the outermost shell for nitrogen), which includes the \$2s\( and \)2p$ orbitals.
Count the electrons in the \$2s\( and \)2p$ orbitals: \(2 + 3 = 5\) valence electrons.
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