Using the Bohr model, modified as in Example 28-7, what is the atomic number, Z, of an atom whose K line has a wavelength of 6.20 x 10−10m, and what is the wavelength, lambda, for a transition from n = 3to n = 2 for this atom(if one may take for the Rydberg constant, R = 1.097 x 107/m)?