explain molecules and irons
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ions are chemical combination of only one type of element ex h2 or c2
molecules are chemical combination of 2 or more element but in fix proprotion ex h2o ,co2
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A pure substance consists of a single element or compound. Iron is formed only of iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules. A mixture, however, is made up of different compounds and/or elements.
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