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11 December, 05:40
Why is Copper (II) Oxide "CuO" instead of "Cu2O"
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Gilbert Clayton
11 December, 08:09
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This is because ... Oxygen has a valency of - 2. When the elements react, their switch their valencies. The valency of copper goes to oxygen. And oxygen goes to Cu
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Ana Huang
11 December, 08:58
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The (II) is a roman numeral indicating the oxidation number of a transition metal. It is used when you refer to the element/compound by name but does not show up in the formula.
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