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14 February, 14:09

When oxygen and calcium form an ionic bond, what is the formula? o2ca2 oca ca2o2 cao

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  1. 14 February, 16:46
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    Calcium has a 2 + charge and Oxygen has a 2 - charge.

    To get the formula you have to balance the charges so that it's neutral. In this case a 2 - and 2 + charge cancel each other out making the formula CaO.
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