Is copper a product or a reactant?

Answer 1

For copper, it is an element. It could be both reactant and product. While purifying copper will be the product. But copper would be the reactant in case of preparing hydrogen or copper sulphate salts.

Answer 2

copper may be a reactant or may be a product depending upon reaction

Answer 3

that depends upon nature of reaction... may be reactant in some reactions and product in other reactions...