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S8P1.b
| Term | Definition |
|---|---|
| pure substance | a sample of matter, either a single element or a single compound, that has definite chemical and physical properties. |
| compound | a substance made up of atoms or two or more different elements joined together by chemical bonds. |
| molecule | the smallest unit of a substance that keeps all of the physical and chemical properties of that substance. |
| chemical formula | a combination of chemical symbols and numbers to represents substance. |
| subscript | a small number written to the right and slightly below a chemical symbol to tell the number of atoms |
| mixture | a combination of two or more substances that are not chemically combined. |