1. Does the square well potential energy persist after on electron is trapped to the ground or an excited state? What is the one-dimensional potential energy expression for the second electron?

2. Describe qualitatively the three lowest possible two-electron bound solutions taking into account electron spin so two electrons can occupy one energy level: both symmetric at the ground state; on at the asymmetric ground state and one at the first excited antisymmetric state; and both at the first excited antisymmetric state. Is it possible to have a well width that the first two solutions above do not exist and the lowest allowed energy is one I which both electrons have the one node antisymmetrical wave function? Explain.