Question: (a) Write the electronic Hamiltonian operator, , in atomic units for the Ge atom, H , He2+, H20+ and ethyne (C2H2). (11 marks) (b) (i)

(a) Write the electronic Hamiltonian operator, , in atomic units for

(a) Write the electronic Hamiltonian operator, , in atomic units for the Ge atom, H , He2+, H20+ and ethyne (C2H2). (11 marks) (b) (i) Using P = E , and o?dr = {e prove the Variational Principle. i (6 marks) (ii) For a two-electron system, prove that a Hartree product of spin orbitals does not obey the Pauli principle

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