| A | B |
|---|
| chemistry | the study of interactions between elements |
| element | a substance that cannot be broken down |
| atom | tiny particles making up elements |
| symbol | one or two letters representing the name of an element |
| compound | a substance make of two or more elements chemically combined in a specific ratio |
| formula | shows the ratio of elements in the compound |
| mixture | made of two or more elements, compounds, or both combined without a chemical process |
| physical change | A change that alters the appearance, but not the chemical structure |
| chemical change | a change in matter that produces new substances where the atoms are rearranged |
| chemical reaction | a process in which substances undergo chemical changes |
