Verify that the parities of the one-electron atom eigenfunctions 300, 310, 320, and 322 are determined by (-1)².

(4) Electronic energy level of a hydrogen atom is given by R ; п %3D 1,2, 3,... n2 E = - and R = 13.6 eV. Each energy level has degeneracy 2n2 (degeneracy is the number of equivalent configurations associated with the energy level). (a) Derive the partition function for a hydrogen atom at a constant temperature. (b) Consider that the energy level of a hydrogen atom is approximated by a two level system, n = 1,2. Estimate the mean energy at 300 K.

At time t = 0 the wave function of the hydrogen atom is: where we ignore the spin.(a) Calculate the expected value of energy for this system.(b) What is the probability of finding the system at l = 1, m = +1 as a function of time?(c) What is the probability of finding the electron around 10−10 cm from the proton, at t = 0s (canapproximate).(d) Write the time-dependent wave function: ψ (r,t)

A deuterium molecule (D2₂) at 30°K is known to be in the state, 1 /26 12/₂) = = |3|1, 1) + 4 |7, 3) + |7, 1) where , m) are eigenstates of the angular momentum operator. (a) If one were to measure L₂, what posible values one would get and what would be their associated probabilities? (b) Repeat (a) but for L². (c) What is the expectation value of the energy (E) of the molecule in this state, assuming purely rotational states. Take c= 30.4 cm-¹, where I=moment of inertia of D₂ and c=speed of light. Express your answer in eV. -