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No, silicon dioxide is a molecule.
Silicon dioxide is a compound.
Silicon and oxygen, in this form.
SiO2
Silicon dioxide.
Which one is mixture
carbon dioxide = compound
silicon = element
silicon dioxide = compound
or sand = mixture
so sand is the answer.
Silicon dioxide is a compound of the elements silicon and oxygen.
Its chemical formula is SiO2.
Impure Silicon dioxide is very common ; it is the sand on a beach.