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Is silicon dioxide a pure compound or mixture?
Silicon dioxide is a chemical compound (pure) made of one silicon atom and two oxygen atoms. Silicon dioxide is otherwise known as sand.
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It might be useful to know that silion dioxide actually can make many different minerals besides sand. In fact, it is one of the few inorganic compounds that can make a network-covalent solid. This is known as quartz. I have also heard that by mass, silicon dioxide is the most common chemical compound on the planet, since a huge amount of the lithosphere (aka all the rocks) contain the compound. I am not sure how correct that is, however. Just thought I would share.
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