Ahydrogen atom, whose normalized stationary state is described by inlm), where n is the main quantunm number and l and m is the quantum numbers belonging to l and lz: nlm) = 1 as usual the following operators is introduced here we neglect spin and fine structure a hydrogen atom is descripted by the normalized wave function: (|210) + |211)) account for the fact that lp) is an energy state, and find the corresponding energy. is lp) an eigenstate for 12 1. 2. find the mean of l in the state lp). account for the fact, that around the standard deviations on the observables lx and ly the following must be the case calculate l+lw) and l_lp). find the expectation value(l.) and(ly〉 in the state 14) 3. 4.