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When silver coins are found in ancient shipwreck's they are coated with a black crust What question could you decide whether the silver underwent a chemical or physical change?
Wiki User
∙ 14y ago
You would need to know if the silver underwent change that left the silver as it was originally, (in this case, having a black substance attach to it) or a change that made the silver into a new substance (like tarnishing). If the silver is still the same before and after the change, it was a physical change. If the substance is changed into a different substance after the change, it is a chemical change.
Wiki User
∙ 14y ago
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