| A | B |
|---|
| subscript | shows the number of atoms of an element in a molecule |
| reactants | materials at the beginning of an equation |
| products | materials on the right side of an equation |
| conservation of mass | matter is not created or destroyed |
| balanced equation | has the same number and type of atoms on both sides |
| coefficient | number in front that tells how many molecules or atoms |
| exothermic | reaction that releases energy in the form of heat |
| endothermic | reaction that absorbs heat energy |
