In group 16 silicon dioxide is really a very common compound that broadly happens as sand or quartz. SiO2 is tetrahedral with Just about every silicon atom surrounded by four oxygen atoms. Various crystalline forms exist Using the tetrahedra linked to kind a polymeric chain. Examples are tridymite and cristobalite. https://collinlmkol.blogrelation.com/45332227/a-simple-key-for-titanium-nitride-unveiled