| A | B |
|---|
| ATOM | SMALLEST WHOLE BIT OF MATTER |
| CHEMICAL BOND | FORCE THAT HOLD ATOMS TOGETHER |
| MOLECULE | TWO OR MORE ATOMS BONDED TOGETHER |
| NUCLEUS | CENTER OF AN ATOM |
| PROTON | POSITIVELY CHARGED PARTICLE IN THE NUCLEUS |
| NEUTRON | PARTICLE IN THE NUCLEUS WITH NO CHARGE OR NEUTRAL |
| ELECTRON | NEGATIVELY CHARGED PARTICLE THAT MOVES AROUND THE NUCLEUS |
| ATOMIC NUMBER | TELLS US THE NUMBER OF PROTONS AND THE NUMBER OF ELECTRONS |
| BOHR MODEL | PLANETARY MODEL--FLAT |
| ELECTRON CLOUD MODEL | THE NEWER MODEL WHERE THE ELECTRONS GIVE A CLOUD APPEARANCE |
| SYMBOL | LETTER OR LETTERS THAT STAND FOR AN ELEMENT |
| PERIODIC TABLE OF THE ELEMENTS | A CHART THAT GROUPS THE ELEMENTS |
| FORMULA | A GROUP OF SYMBOLS THAT SHOWS THE ELEMENTS IN A COMPOUND |
| ATOMIC MASS | THE NUMBER OF PROTONS PLUS THE NEUTRONS COMBINED IN THE NUCLEUS |
