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I believe it is Magnesium Oxide. The 2 should be subscript, denoting the presence of two atoms of magnesium. This is because magnesium has a charge of -1, versus oxygen's typical charge of +2. Two atoms of magnesium balances the compound. No, magnesium oxide would be MgO - the magnesium has an oxidation number (or charge) of +2, compared with -2 for oxygen, so one of each is needed to balance out the molecule. I don't think Mg2O exists.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoIt doesn't exist. MgO exists, which is Magnesium Oxide, and MgO2 exists, which is Magnesium Peroxide, but Mg2O2 doesn't. Hope this helped!
Wiki User
∙ 7y agoThe meaning is two molecules of magnesium oxide (2 MgO).
Wiki User
∙ 13y agoMagnesium peroxide.
Wiki User
∙ 13y agoMagnesium carbonate
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