1. The substances that take part in a chemical reaction are called reactants.

    The substances that take part in a chemical reaction are called reactants.

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  2. The change where new substance is formed is called a chemical change.

    The change where new substance is formed is called a chemical change.

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  3. The process that leads to a chemical change is called a chemical reaction.

    The process that leads to a chemical change is called a chemical reaction.

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