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5 June, 12:26

How many protons and electrons are present in O²⁻? a) 8 protons and 8 electrons b) 10 protons and 8 electrons c) 8 protons and 10 electrons d) 16 protons and 8 electrons e) none of the above

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  1. 5 June, 15:23
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    c) 8 protons 10 electrons

    Because there would usually be 8 of both, but in this case there has to be 2 more electrons to give it the ²⁻ charge
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