• # question_answer 75)   Carbon and silicon both belong to group 14, but inspite of the stoichiometric similarity, the dioxides, (i.e., carbon dioxide and silicon dioxide) differ in their structures. Comment.

The carbon, the first member of group 14 possesses a pronounced ability to form stable $p\pi -p\pi$ multiple bonds with itself and with other first row elements such as nitrogen and oxygen. In$C{{O}_{2}}$, both the oxygen atoms are linked with carbon atom by double bonds. However, silicon shows its reluctance in forming $p\pi -p\pi$multiple bonding due to large atomic size. Thus, in$Si{{O}_{2}}$,oxygen atoms are linked to silicon atom by single covalent bonds giving three dimensional network.