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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 two or more different elements joined by chemical bonds |
molecule | the smallest unit |
chemical fomula | a combination of chemical symbols and number to represent a substance |
subscript | a small number written to the right and slightly below a chemical symbol to tell the number of atoms of that element in the substance |
mixture | a combination of two or more substances that are not chemically combined |