| A | B |
|---|
| chemical reaction | occur when bonds are broken and/or reformed |
| endothermic reaction | a reaction that absorbs energy in the form of heat |
| exothermic reaction | reaction that gives off excess energy in the form of heat |
| chemical formula | combination of symbols and subscripts that represents a molecule |
| chemcial equation | a short, easy way to show a chemical reaction |
| reactants | materials on the left side of a chemical equation; materials you have to start a chemical reaction |
| products | materials on the right side of a chemical equation; material you have at the end of a chemical reaction |
| precipitate | a solid that forms from solution during a chemical reaction |
| balanced | a chemical equation that has the same number of atoms of each element on the reactant and product sides |
| synthesis reaction | a chemical reaction where two or more simple substances combine to form a more complex substance |
| decompostion reaction | a chemical reaction where a complex substance breaks down into two ro more simpler substances |
| repalcement reaction | a chemical reaction where two or more substances trade places within molecules |
