| A | B |
|---|
| inhibitor | actions or substances that stop or slow down reactions |
| single displacement reaction | reaction where 1 element replaces another |
| exothermic reaction | reaction that gives off energy |
| coefficient | number written before an element or compound showing the number of units of each substance |
| balanced chemical equation | equation that has equal numbers of atoms on both sides of the yield sign |
| precipitate | insoluble solid that forms in a solution during some chemical changes |
| synthesis reaction | reaction where 2 or more elements combine to make 1 new substance |
| activation energy | smallest amount of energy needed to make molecules react |
| decomposition reaction | reaction where 1 substance breaks down into 2 or more simpler substances |
| endothermic reaction | reaction where energy must be provided to make the reaction take place |
| reactants | substances to the left of the yield sign |
| catalyst | actions or substances that speed up reactions |
| chemical equation | an expression that describes a chemical reaction using symbols and formulas |
| subscript | number written after and below an element showing the number of atoms |
| products | substances to the right of the yield sign |
| double displacement reaction | reaction where 2 elements are replaced and often create water, a gas, or a precipitate |
| Law of Conservation of Mass | mass is neither created nor destroyed during ordinary physical and chemical changes |
| chemical bond | force that holds the new substances together |
| chemical reaction | process where one or more substances combine to make an entirely new substance with new properties |
