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S8P1.b
Describe the difference between pure substances (elements & compounds) & mixture
Term | Definition |
---|---|
pure substance | a sample of matter, either a single element or a single compound that has definite chemical & physical properties. |
compound | a substance made up of atoms of two or more different elements joined by chemical bonds. |
molecule | the smallest unit of a substance chemical properties of that substance. |
chemical formula | a combo 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 elements in the substance. |
mixture | a combo of 2 or more substances that arent chemically combined. |