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0-2 = -2 is a number. There are no electrons in a number.

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7y ago
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1mo ago

There are 2 electrons in an oxygen ion with a charge of -2. This is because oxygen normally has 6 electrons, but when it gains 2 extra electrons to become an ion with a charge of -2, it now has 8 electrons total.

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Q: How many electrons are there in 0-2?
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