Question: what is the general difference in magnitude between the first and second ionization energy?
Answer: And 2nd ionization energy is higher than 1st ionization energy, 3rd is higher than 2nd, and so forth. (I just wanted to clarify from an above answer: 2nd i.e. is not the energy it takes to remove 2 electrons together; it's the energy it takes to remove 1 electron from an atom that has already lost 1 electron before.)