Chapter 5, Problem 5.2P

On the basis of molecular orbitals, predict the shortest bond, and provide a brief explanation.
a. ${\text{Li}}_{{\text{2}}^{+}}{\text{Li}}_{\text{2}}$
b. ${\text{F}}_{{\text{2}}^{+}}{\text{F}}_{\text{2}}$
c. ${\text{He}}_{{\text{2}}^{\text{+}}}{\text{HH}}_{{\text{e}}^{+}}{\text{H}}_{\text{2}}{}_{{}^{+}}$