# Application of LCAO

Chemistry Level pending

If the lowest energy MO of HeH$$^{+}$$ has the following form: $\psi_{mol} = C_{1} \phi^{\text{H}}_{1s} + C_{2} \phi^{\text{He}}_{1s},$ do you expect $$C_{2}$$ to be larger or smaller than $$C_{1}$$?

Use the electron correlation diagram of HeH$$^{+}$$.

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