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Distinguish between.......
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 bound |
molecule | the smallest unit of a substance that keeps all of the physical and chemical properties of that substance |
chemical formula | a combination of chemical 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 atom of that element in the substance |
mixture | a combination of two or more substances that are not chemically combined |