Why co2 is a gaseous monomaric compound but silicon dioxide is a polymeric solid

Carbon dioxide has the equation CO2 and exists as monomeric units (like O=C=O) which have powerless collaborations between the particles, it takes just a little measure of vitality to separate the strong and it is a gas at typical temperatures and ordinary weight. Silicon dioxide exists as a polymer (more like (SiO2)n where n can be a huge number), so bunches of O-Si-O-Si-O atoms in a polymer cross section. So this as a high liquefying point and is a strong at ordinary temperature and weight, sand being an illustration. 

So they are connected, in that they have a valence of +4, yet CO2 has 2 twofold bonds to oxygen as a monomer, while SiO2 comprises of Si-O bonds in a cross section, every Si being appended to 4 oxygens. 

Cheers!!

Regards,

Vikas (B. Tech. 4^th year
Thapar University)