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02-02-2016
Biology

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Oxygen has an atomic number of 8. The n = 1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen's valence is _____.

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04-02-2016

For elements that are not transition metals, the number of valence electrons they have is equal to the number in the ones place of their period number. Oxygen is in Period 16, so it has 6 valence electrons.

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