The ionization energy of hydrogen is defined as the minimum energy required to excite an electron from the ground state to a state where the electron is separated from the nucleus (the proton). From your answers above, what is the ionization energy for hydrogen? Justify your answer in one or two sentences.

How much energy would be required to ionize an entire mole of hydrogen atoms?

If I remember you calculated the energy of the n = 1 orbit in hydrogen. I have forgotten the value for that but that is the energy that will be required to ionize the H atom.