1. The problem statement, all variables and given/known data Calculate the Kα and Kβ wavelengths for He and Li Ive seen https://www.physicsforums.com/showthread.php?t=118050 and the two websites that were given for tables, but I need to show calculations. 2. Relevant equations K alpha Energy=10.2eV*(Z-1)2? E=hc/λ 3. The attempt at a solution Ive tried using the above equations to find energy and thus wavelengths for He and Li k-alpha, but they dont match the values found from http://xdb.lbl.gov/Section1/Table_1-2.pdf and http://www.csrri.iit.edu/periodic-table.html says they have no wavelengths... I also have no idea how to calculate for k beta.