| A | B |
|---|
| matter | Anything that has mass and takes up space. |
| chemistry | The study of the properties of matter and how matter changes. |
| substance | A single kind of matter that is pure and has a specific set of properties. |
| physical property | A characteristic of a pure substance that can be observed without changing it into another substance. |
| chemical property | A characteristic of a substance that describes its ability to change into different substances. |
| element | A pure substance that cannot be broken down into other substances by chemical physical means. |
| atom | The basic particle from which all elements are made; the smallest particle of an element that has the properties of that element. |
| chemical bond | The force of attraction that holds two atoms together. |
| chemical formula | Symbols that show the elements in a compound and the ratio of atoms. |
| compound | A substance made of two or more elements that are chemically combined in a specific ratio, or proportion. |
| molecule | A neutral group of two or more atoms held together by covalent bonds. |
| mixture | Two or more substances that are held together in the same place but their atoms aren't chemically bonded. |
