| A | B |
|---|
| ELEMENT | A PURE SUBSTANCE. THE SMALLEST UNIT THAT MATTER CAN BE BROKEN INTO WHILE RETAINING THE PROPERTIES OF THE MATTER. |
| ATOM | THE BUILDING BLOCKS OF ALL MATTER, ELEMENTS AND COMPOUNDS. |
| COMPOUND | TWO OR MORE DIFFERENT ELEMENTS JOINED TOGETHER. |
| PERIODIC TABLE | AN ORGANIZATIONAL CHART THAT GROUPS ATOMS ACCORDING TO SIMILAR PROPERTIES. |
| PROTON | A SUBATOMIC PARTICLE IN THE NUCLEUS THAT HAS A POSITIVE CHARGE. |
| NEUTRON | A SUBATOMIC PARTICLE IN THE NUCLEUSTHAT HAS NO CHARGE. |
| ELECTRON | A SUBATOMIC PARTICLE ORBITTING THE NUCLEUS THAT HAS A NEGATIVE CHARGE. |
| MOLECULE | TWO OR MORE ATOMS JOINED TOGETHER. |
