why co2 is gas and sio2 is solid?
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In $C{O_2}$ there is a double bond between carbon and oxygen atoms. Carbon has a tendency to make bonds with oxygen but silicon cannot make bonds with oxygen due to which it forms a giant molecular network with oxygen. ... Due to this the bonding in this molecule is very strong and hence it exists as solid.
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CO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms. Silicon does not form double bonds with oxygen.CO2 is gas but SiO2 is solid because the SiO2 is in giant molecular structure but the CO2 is simple molecular structure.Because of this reason CO2 is gas but SiO2 is solid.
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