| A | B |
|---|
| atom | smallest part of an element |
| element | pure substances that cannot be changed into simpler substances |
| compound | pure substances that are composed of two or more types of elements that are chemically combined |
| molecule | two or more atoms joined; smallest part of a comound |
| pure substances | elements and compounds |
| chemical change | needed to separate compounds into simpler substances |
| heterogeneous and homogeneous | types of mixtures |
| vegetable soup | heterogeneous mixture |
| sea water; air; soda | homogeneous mixture |
| hydrogen | example of an element |
| water | example of a compound |
| represented by a chemical symbol | element |
| represented by a formula | compound |
| Na | element |
| C6H12O6 | compound |
