Multiple Choice
How many valence electrons are in an atom of nitrogen (N)?
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9. Electrons in Atoms and the Periodic Table
Valence Electrons of Elements (Simplified)
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How many valence electrons does an oxygen atom (O) have?
A
6
B
7
C
8
D
2
Verified step by step guidance1
Identify the element in question, which is oxygen (O).
Determine the atomic number of oxygen, which is 8, meaning it has 8 electrons in total.
Recall that valence electrons are the electrons in the outermost shell (energy level) of an atom.
Write the electron configuration of oxygen: \$1s^2\ 2s^2\ 2p^4$.
Count the electrons in the outermost shell (the second shell), which includes the \$2s^2\( and \)2p^4$ electrons, giving a total of 6 valence electrons.
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