91Ó°ÊÓ

Benzene, formula \(\mathrm{C}_{6} \mathrm{H}_{6}\), is a perfect closed hexagon of carbon atoms, each with one hydrogen atom attached. Draw a dot diagram for this molecule, and include any resonanace forms if

Draw a dot diagram for selenium hexafluoride and explain how it violates the octet rule.

Consider sulfur trioxide. (a) Draw a dot diagram that obeys the octet rule for all of the atoms. (b) Suppose the actual bond order for the \(\mathrm{S}-\mathrm{O}\) bonds was \(2 .\) Draw a dot diagram that explains this, using the concept of expanded octet. Also state whether expanding the octet as you have shown would be allowed, and why.

Does \(\mathrm{BeH}_{2}\) have all of its atoms obeying the octet rule? If not, indicate which atom or atoms violate the octet rule and why it is OK.