Question

Question #1386e

Answer 1

`CuO`

Explanation:

As we know the chemical symbol for copper is Cu while Oxygen is O.

Since this is an ionic compound, the charges of both ions matter

Since the question asked for Copper(II), it suggest that the charge of the copper ion is therefore 2+ and as such will be represented as `Cu^"2+"`.

The Oxide ion forms when it accepts 2 electrons from another element and as such its representation becomes `O^"2-"`.

Both elements have the same charge so using the "switching charge technique" we would obtain `Cu_2O_2`, however in chemistry, WE ALWAYS use the smallest whole number ratio between elements and as such we can divide this by 2 leading us to the formula of `CuO`