1+ - What charge does a sodium ion have?, 1- - An atom with the electron arrangement 2,8,7 would form an ion with what charge?, 2+ - What is the charge on a Magnesium ion?, gain 2 electrons - Oxygen atoms do this to become stable ions, lose 3 electrons - Aluminium atoms do this to become stable ions, gain 3 electrons - Phosphorus atoms do this to become stable ions, 3+ - In iron (III) chloride, what charge do the iron ions have?, Mg2+S2- - The ionic formula of Magnesium sulphide is, K2O - The chemical formula for potassium oxide is, 2- - What is the charge on a sulphide ion?,

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