| A | B |
|---|
| chemical reaction | substance changes to a new substance |
| reactant | starting materials in a chemical reaction |
| product | ending materials in a chemical reaction |
| reaction rate | how quickly reactants turn into products |
| chemical equation | chemical symbols used to show a chemical reaction |
| balanced equation | chemical equation that has an equal number of atoms on both sides of the arrow |
| coefficient | number in front of molecule that tells how many molecules are present |
| subscript | tells number of atoms of the element present in a molecule (appears below line) |
| compound | two or more different elements (atoms) chemically bonded together |
| molecule | two or more elements (atoms) chemically bonded together |
| element | pure substance |
| atom | smallest portion of an element that cannot be futher broken down |
