define element and compound
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- Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms. ... A compound is a substance formed when two or more elements are chemically joined. Water, salt, and sugar are examples of compounds.
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Molecules of most elementsare made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms. ... Acompound is a substance formed when two or moreelements are chemically joined. Water, salt, and sugar are examples of compounds.
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