Which is bigger b/w O^2+ and Mg^2+
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Mg2 is bigger than O2
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ANSWER.
will have larger atomic size. O2- has 10 electrons and 8 protons, while Mg+ has 10 electrons and 12 protons. As in Mg+ number of protons is more that compared to O2- the attraction force between the nucleus and the electrons will increase and the atom of Mg2+ will get shrink and hence has smaller atomic size
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