College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 41

A hydrogen atom is in its first excited state ( n = 2). Using the Bohr theory of the atom, calculate (a) the radius of the orbit, (b) the linear momentum of the electron, (c) the angular momentum of the electron, (d) the kinetic energy, (e) the potential energy, and (f) the total energy.