Chapter 6, Problem 70AP

The molecular ion ${\text{HeH}}^{+}$ has an equilibrium bond length of 0.774 Å. Draw an electron correlation diagram for this molecule, indicating the occupied MOs. If the lowest energy MO has the form $C_1{\psi }_{1s}^H+C_2{\psi }_{1s}^H$ , do you expect ${\text{C}}_{\text{2}}$ to be larger or smaller than ${\text{C}}_{\text{1}}$ ?