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S8P1.b
describe the difference between pure substances and mixtures
Term | Definition |
---|---|
pure substances | 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 of two or more different elements joined by chemical mass |
molecule | a smallest unit of substance that keeps all of the physical and chemical properties of that substances |
chemical formula | a combination of chemical symbols and numbers to representa 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 substances |
mixture | a combination of two or more substances that are not chemically combined |