One of the most famous of the obsolete theories of the hydrogenatom was proposed by Bohr. It has been replaced by quantummechanics but, by a remarkable coincidence (not the only one wherethe Coulomb potential is concerned), the energies it predicts agreeexactly with those obtained from the nucleus. The Coulombic forceof attraction,(Ze2)/(4πεor2), isbalnaced by the centrifugla effect of the orbital motion. Bohrproposed that the angular momentum is limited to integral values ofh-bar. When the two forces are balanced, the atom remains instationary state until it makes a spectral transition. Calculate the energies of a hydrogenic atom using the Bohr model.