Multiple Choice
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
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many valence electrons does an atom of nitrogen (N) have?
A
5
B
2
C
3
D
7
Verified step by step guidance1
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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