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S8P1.b
Describe the difference between pure substances and mixtures
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 bonds |
molecule | the smallest unit of 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 character or symbol written directly beneath or next to and slightly below a letter or number |
mixture | a combination of two or more substances that are not chemically combined |