| A | B |
|---|
| chemical equation | expresses a chemical reaction using chemical formulas |
| reactant | substance that enters a chemical reaction |
| product | result of a chemical reaction |
| chemical reaction | process of changing a substance into new substances with different chemical and physical properties. |
| synthesis reaction | chemical reaction in which a new substance is produced from two or more reactants |
| decomposition reaction | chemical reaction in which a substance is broken down into simpler substances |
| single-replacement reaction | chemical reaction in which an uncombined element replaces an element in a compound |
| double-replacement reaction | chemical reaction in which two different atoms in different compounds replace each other |
| exothermic reaction | chemical reaction in which energy is released |
| endothermic reaction | chemical reaction in which energy is absorbed |
| activation energy | energy needed for a chemical reaction to occur |
| kinetics | study of reaction rates |
| reaction rate | speed at which a chemical reaction takes place |
| collision theory | idea that reaction rate depends on the number of collisions between the atoms |
| catalyst | substance that speeds up reaction rates without changing the chemical reaction |
