| A | B |
|---|
| chemical reaction | The process by which one or more substances change to produce one or more different substances. |
| precipitate | A solid that is produced as a result of a chemical reaction in solution. |
| chemical formula | A combination of chemical symbols and numbers to represent a substance. |
| chemical equation | A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products. |
| reactant | A substance or molecule that participates in a chemical reaction. |
| product | The substance that forms in a chemical reaction. |
| law of conservation of mass | The law states that mass cannot be created or destroyed in ordinary chemical and physical changes. |
| exothermic reaction | A chemical reaction in which heat is released to the surroundings. |
| endothermic reaction | A chemical reaction that requires heat. |
| law of conservation of energy | The law states that energy cannot be created or destroyed but can be changed from one form to another. |
| activation energy | The minimum amount of energy required to start a chemical reaction. |
| inhibitor | A substance that slows down or stops a chemical reaction. |
| catalyst | A substance that changes the rate of a chemical reaction without being used up or changed very much. |
