Is it easier to form a positive ion with an element that has a high ionization energy or element that has a low ionization energy? explain.

It's easier when an atom or molecule has a low ionization energy. Because ionization energy is, the minimum energy needed to remove an electorn from an atom or a molecule in the gas phase. So if an atom has a lower ionization energy, you can remove an electron and form an ion easily. 

I’m not sure what your trying to say here.. can you clarify again?