1. The atomic number of osmium is Z = 76. According to the Bohr model, what is the energy (in joules) of a K X-ray photon? 2. ? 3. The reason I left relavent eqns blank is because I used the following: En = -(13.6) Z^2/n^2 subtracting one from Z before squaring and converting to joules gave me an incorrect answer of En = 1.226 x 10^-14 J. I do not believe I am using the right equation but it is the only one my book offers for this. Please help. Thanks.