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describe the difference between pure substances and mixtures
Term | Definition |
---|---|
pure substance | a sample of matter that has definite chemical and physical properties |
compound | a substance made up of 2 or more elements joined by chemical bonds and atoms |
molecule | the smallest unit of a substance that keeps all of the physical and chemical properties of that substance |
chemical formula | a way of expressing the proportions of atoms |
subscript | a number or figure that is smaller than the average or normal type of thing. |
mixture | two chemicals or elements mixed together by chemical bonds |