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S8p1.b
Describe the difference between pure substances (e and c)and mixtures
Term | Definition |
---|---|
pure substance | a sample of matter, either a single element or a single compound, that has definite chemical and physical properties pure substance |
compound | a substance made up of atoms of two or more different elements joined by chemical bonds compound |
molecule | he smallest unit of a substance that keeps all of the physical and chemical properties of that substance molecule |
chemical formula | combination of chemical symbols and numbers chemical formula 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 subscipt |
mixture | a combination of two or more substances that are not chemically combined mixture |