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S8P1.b
Distinguish between
Term | Definition |
---|---|
pure substance | a sample of matter, either 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 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 lightly below a chemical symbol to tell the number of atoms |
mixture | a combination of two or more substances that are not chemically combined |