Question

copper (ii) oxide formula using criss cross method
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Answer 1

Answer:

So, if the copper ion has a charge of +1, and the oxygen ion has a charge of -2, it will take 2 copper ions to balance the charge on the oxygen ion. Hence, the formula is CuO. There's a shortcut method that can be used once the concept of electric neutrality is understood. It's called the Criss-Cross Method..