How many electrons will oxygen have to have to have a +2 charge?

here is your answer hope this helps I’m sorry if I get it wrong

Explanation:

This means that the nuclei of all oxygen atoms have eight protons. A neutral oxygen atom will also have eight electrons. In an oxygen ion with a 2− charge, the number of protons is still 8, but the number of electrons is 10. This results in the oxygen ion having an octet (8) of valence electrons.

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explanation:

why?

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the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.