to :l' IQ U'I to .0\" . Angular momentum addition: What is the maximum angular momentum |L.[> for the combination of the angular momentum quantum numbers (1 = '2 and (2 = 1'? What are the different types of quantum-numbers? . What is the symmetry of the propability density of the wave function of hydrogen in the 13 state? What symmetry has the 23) state? What can be observerd at the Zeemann effect'? . What can be observed at hte Stem Gerlach experiment? What is the origin of the nestructure splitting