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Bot GPT 3.5 An ionic bond is formed when one atom transfers electrons to another atom. In the case of magnesium and oxygen, magnesium (Mg) has two electrons in its outer shell, while oxygen (O) has six electrons in its outer shell.
Mg will transfer its two outer electrons to O, resulting in Mg2+ and O2- ions. The resulting ions will be attracted to each other due to their opposite charges, forming an ionic bond between magnesium and oxygen.
The chemical formula for magnesium oxide, the compound formed by the ionic bond between magnesium and oxygen, is MgO.