Multiple Choice
In which orbitals are the valence electrons of carbon (C) located?
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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
Which element has 2 energy levels and 5 valence electrons?
A
Fluorine (F)
B
Boron (B)
C
Oxygen (O)
D
Nitrogen (N)
Verified step by step guidance1
Understand that the number of energy levels corresponds to the period (row) of the element in the periodic table. Elements in period 2 have 2 energy levels.
Recognize that the number of valence electrons corresponds to the group number for main-group elements. For elements in period 2, the valence electrons are the electrons in the 2s and 2p orbitals.
Identify the element with 2 energy levels (period 2) and 5 valence electrons. The valence electrons for period 2 elements range from 1 to 8, corresponding to groups 1 to 8.
Recall the electron configuration for nitrogen (N), which is 1s² 2s² 2p³, showing 2 energy levels and 5 valence electrons (2 in 2s and 3 in 2p).
Compare the options given (Fluorine, Boron, Oxygen) and confirm that nitrogen fits the criteria best, even though it was not listed as an option.
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