State Born-Oppenheimer’s approximation and its significance.
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Define the perturbation method. Formulate an expression for the energy of a helium atom considering electron-electron repulsion as a first-order perturbation.
State the Great Orthogonality Theorem. Derive the characters of the irreducible representation of the point group.
What determines whether the and
orbitals of Period 2 elements mix?
Define a blackbody and discuss why classical mechanics failed to explain the blackbody radiation problem.
Justify the statement: "The average distance of the electron in the ground state of hydrogen atom is more than its most probable distance in the same state."
Why can’t the ground state energy of a particle confined to a one-dimensional box be zero?
What is accidental degeneracy?