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S8P1.b
Describe the difference between pure substances and mixtures
Term | Definition |
---|---|
pure substance | a sample of matter, either a single element or a simple compound, that has definite chemical or physical properties |
compound | a substance made up of atoms of 2 or more elements joined by chemical bonds |
molecule | the smallest unit of a substance that keeps all physical and chemical properties of the substance |
chemical formula | a combination of symbols and numbers to represent a substance |
subscript | a small number written to the right and slightly below a chemical symbol to tell the number of atoms that the element substance |
mixture | 2 or more substances that are not chemically combined |