Ionization Energy & Electron Affinity on Periodic Table
Sort of like what happened with electronegativity, the periodic table won't give you a number for ionization energy of each element. But almost all chemistry teachers require you to know the general trends of ionization energy, and you'll need to be able to compare two atoms and say which one has a higher first and second ionization energy.
Ionization Energy Calculations Using Rydberg Equation
One of the many uses of the Rydberg equation (oh what a wonderful equation!) is calculating the ionization energy of a hydrogen atom. What fun! What splendor! Quick man, to the calculators!
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)