Term Definition
chemical reaction Process in which atoms of one or more substances rearrange to form one or more new substances.
chemical equation Description of a reaction using element symbols and chemical formulas.
reactant Starting substances in a chemical reaction.
product Substances produced by the chemical reaction.
law of conservation of mass States that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction.
coefficient Number placed in front of an element symbol .

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