| A | B |
|---|
| balance | action to ensure both sides of a chemical equation are correct |
| chemical change | change in a substance that involves breaking and reforming of chemical bonds to make one or more different substances |
| chemical equation | chemical formulas and symbols that represent a reaction |
| chemical reaction | breaking chemical bonds in reactants and reforming them into products |
| coefficient | placed in front of a chemical formula to indicate how many there are |
| conservation of atoms | the number of each type of atom must be equal on both sides of a chemical equation |
| conservation of mass | total mass of the products of a reaction is equal to the total mass of the reactants |
| excess reactant | some of the reactant will be left over when the reaction is complette |
| limiting reactant | reactant that is used up first |
| percent yield | actual yield divided by the predicted yield multiplyed by 100 |
| physical change | change that affects only the physical properties of a substance |
| polymer | a molecule that consists of long chains of repeating combinations of atoms |
| product | substances that are formed |
| reactant | substances that change |
| predicted yield | the amount of product that shouold be produced in a chemical reaction |
| actual yield | the amount of product measured after a chemical reaction |
| physical property | the state, size, or shape of a substance |
