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S8P1 b
describe the physical and chemical changes between pure substances(elements and
Term | Definition |
---|---|
pure substance | a sample of matter, either a single element or a single compound, that has definite chemical or physical properties |
compound | a substance made up of atoms of two or more different elements joined by chemical bounds |
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 |
mixture | a combo of two or more substances that aren't chemically combined |