It would be called an alloy.
It is a trial aimed to reduce bias during an experiment. An example would be a sugar pill, something that has no real effect so that the results of the true trial can accurately be compared. Its like a control group.
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Scientists believe the batteries (if that is their correct function) were used to electroplate items such as putting a layer of one metal (gold) onto the surface of another (silver), a method still practiced in Iraq today.
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Chemical Property describes the way substances react with other substances to form new substances.
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Hope it helps you
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A camel stores fat in its hump, while the cactus stores water in its thick stem.
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