| A | B |
|---|
| chemical reaction | physical and chemical changes that create a new substance with new properties |
| reactant | the starting materials in a chemical reaction |
| product | the new substances produced in a chemical reaction |
| synthesis reaction | 2 or more simple substances combine to form a more complex substance |
| decomposition reaction | complex substance breaks down into 2 or more simpler substances |
| single-replacement reaction | an uncombined element replaces an element that is part of a compound |
| double-replacement reaction | different atoms in 2 different compounds replace each other |
| exothermic reaction | reaction where energy is released |
| endothermic reaction | reaction where energy is absorbed |
| activation energy | energy needed for a reaction to occur |
| kinetics | the study of the rates of chemical reactions |
| catalyst | increase the rate of a reaction by lowering activation energy |
| Law of Conservation of Mass | states that atoms can neither be created nor destroyed |
