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pure substance a sample matter, either a single element or a single compound, that has definite chemical and physical prperties
compound a substance made up of atoms of two or more different elements joined by chemical bonds
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 atoms of that element in the substance
mixture a combination of two or more substances that are not chemically combined
Created by: leymcc44