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Which of the following is the correct number of valence electrons in the element sulfur (S)?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Oxygen has a total of eight electrons. How many valence electrons does an oxygen atom possess?
A
4
B
6
C
8
D
2
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Recall that valence electrons are the electrons in the outermost shell (energy level) of an atom that are involved in chemical bonding.
Determine the electron configuration of oxygen, which has 8 electrons. The configuration is 1s\^2 2s\^2 2p\^4.
Identify the outermost shell for oxygen, which is the second shell (n=2), containing the 2s and 2p orbitals.
Count the electrons in the outermost shell: 2 electrons in 2s and 4 electrons in 2p, totaling 6 valence electrons.
Conclude that oxygen has 6 valence electrons because these are the electrons available for bonding and chemical reactions.
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