is a reaction where two or more reactants (elements or compounds) react to form only a single product
chemical change in which two or more substances react to form a single new substance; also called a synthesis reaction. combined gas law P1 × V1= P2 × V2 T1 T2
A reaction in which two or more substances are chemically bonded together to produce a product. For example, 2 Na(s) + Cl2(g) 2 NaCl(s) is a combination reaction.