| A | B |
|---|
| ATOM | BUILDING BLOCK OF MATTER |
| MATTER | OCCUPIES SPACE AND HAS MASS |
| ELEMENT | MADE OF ONLY ONE TYPE OF MATTER |
| ATOMIC NUMBER | # OF PROTONS; IDENTIFIES ATOM |
| PERIODIC TABLE | LISTS ALL OF THE ATOMS OR ELEMENTS |
| BOND | SHARE OR TRANSFER ELECTRONS |
| CHEMICAL REACTIONS | MAKE OR BREAK BONDS |
| PROTON | POSTIVE CHARGED PARTICLE |
| NEUTRON | NEUTRAL CHARGED PARTICLE |
| ENERGY LEVELS | CONTAIN ELECTRONS |
| NUCLEUS | CONTAIN PROTONS AND NEUTRONS |
| ENZYMES | CATALYZE OR SPEED UP REACTIONS |
| MOLECULE | 2 OR MORE ATOMS BONDED |
| SYMBOL | ABBREVIATIONS OF AN ELEMENT |
| COMPOUND | 2 OR MORE DIFFERENT ATOMS BONDED |
| CHEMICAL FORMULA | ABBREVIATION OF A MOLECULE |
| ACID | COMPUND WITH HYDROGEN IONS |
| BASE | COMPOUND WITH HYDROXIDE IONS |
| ION | CHARGED ATOM OR GROUP OF ATOMS |
