In group 16 silicon dioxide can be a quite common compound that commonly happens as sand or quartz. SiO2 is tetrahedral with Each individual silicon atom surrounded by four oxygen atoms. Numerous crystalline forms exist While using the tetrahedra linked to type a polymeric chain. Examples are tridymite and cristobalite. https://concretereleaseagent49269.p2blogs.com/37358165/everything-about-aluminiumnitrid