In group 16 silicon dioxide can be a very common compound that commonly happens as sand or quartz. SiO2 is tetrahedral with Each individual silicon atom surrounded by four oxygen atoms. Several crystalline varieties exist with the tetrahedra linked to form a polymeric chain. Illustrations are tridymite and cristobalite. A https://raymondjjhhf.eedblog.com/39082052/everything-about-aluminiumnitrid