what is chemical change
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A usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance: The formation of rust on iron is a chemical change.
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A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
Examples are burning of any substance, rusting of iron.
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