| A | B |
| balanced chemical equation | atoms in = atoms out |
| chemical reaction | produces new substances |
| coefficient | number before a chemical formula |
| decomposition reaction | one compound breaks down into 2 or more |
| double displacement reaction | two ionic compounds react |
| endothermic | requires energy to proceed |
| exothermic | gives off energy |
| product | result of a chemical reaction |
| reactant | substance involved in chemical reaction |
| single displacement | an element replaces another in a reaction |
| synthesis | two or more substances combine chemically |
| mole | 6.02 * 10 to the 23rd power |
| molar mass | mass of one mole of atoms or molecules |
| plasma | state of matter at high temp.(no electrons) |
| fusion | nuclear reaction with 2 small nuclei fusing into one |
| fission | nuclear reaction with 1 nucleus splits into 2 |
| critical mass | mass needed to have a chain reaction |
| chain reaction | one reaction causes another etc... |
| subscript | number that tells how many atoms |
| chemical energy | energy found in the bonds of a compound |
| strong nuclear force | force that holds protons and neutrons together |
| combustion | exothermic reaction that gives of carbon dioxide and water |
| oxidation-reduction reaction | reaction where atoms gain or lose electrons |