||Process in which atoms of one or more substances rearrange to form one or more new substances.
||Description of a reaction using element symbols and chemical formulas.
||Starting substances in a chemical reaction.
||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.
||Number placed in front of an element symbol .