2) Consider the He diatomic molecule cation. (a) Write the complete Hamiltonian operator (including the nuclear degrees of free- dom) for the molecule. (b) Write the electronic Hamiltonian operator in atomic units for the molecule He, (Born-Oppenheimer approximation). (c) Sketch the orbital energy diagram of He, making sure that you label the molecular orbitals (including their symmetry labels). What is the electron configuration of the molecule in the ground state.
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