Matching Pairs Reactions and chemical equatioOnline version Relate columns about this topic by José Aarón Lara Velázquez 1 Replacement reactions 2 Products 3 Combustion reaction 4 Chemical reaction 5 Law of conservation of mass 6 Decomposition reaction 7 Synthesis reaction 8 9 Coefficient 10 Reactants It's a number written in front of a reactant or a product. Matter is neither created nor destroy. It separates reactants from products. They are the starting substances on a chemical reaction It's a chemical reaction in which two or more substances (A and B) react to produce a single product (AB). They involve the replacement of an element in a compound. It's the process by which the atoms of one or more substances are rearrenged to form different substances. They are the substances formed during a chemical reaction. It's a chemical reaction in which oxygen combines with a substance and releases energy in the form of heat and light. It's a chemical reaction in which a single compound breaks down into two or more elements or new compounds.