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S8P1.b
describe the difference between pure substance(elements and compound)& mixture
Term | Definition |
---|---|
pure substance | a sample of matter either a single elements or a single compound that is chemical or physical properties |
compound | substance made up of atoms of two or more different elements joined by chemical bond |
molecule | the smallest unit of a substance that keeps all of the physical and chemical properties |
chemical formula | a combination of chemical symbols and numbers to represent a substances |
subscript | a small number written to the right and slightly below a chemical symbol to tell the number of atoms of the element in substance |
mixture | a combination of two or more substances that are not chemically combined |