| A | B |
|---|
| chemistry | the study of the properties of matter and how matter changes |
| element | a substance that cannot be broken down into any other substances by chemical or physical means |
| compound | a substance made up of two or more elements chemically combined in a specific ratio or proportion |
| mixture | made from two or more pure substances-elements, compounds, or both - that are in the same place but not combined as a new material |
| solution | a well-mixed mixture |
| physical change | a change that alters the appearance of a material but does not make the material into another substance |
| chemical change | a change in matter that produces new substances |
| chemical reaction | the process in which substances undergo chemical changes that results in the formation of new substances |
| precipitate | a solid that forms from a solution during a chemical reaction |
| atom | the smallest particle of an element |
| molecule | the combination of two or more atoms |
| chemical bond | the force that holds atoms together |
| chemical equation | a short, easy way to show chemical reactions, using symbols instead of words |
| symbol | a one- or two-letter set of characters that is used to identify elements |
| chemical formula | a combination of symbols that represent the elements in a compound |
| subscript | a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound |
