Question 20 (Essay Worth 3 points)As each electron is removed, one at a time, from an atom of aluminum, more ionization energy is required. Between which two successive ionization energies would you expect the greatest difference (largest change in value)? Explain your answer in terms of attraction, repulsion, and electron arrangement.______________________________________…Please Help...I'm having so much trouble with this chapter

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The last two electrons in the 1s shell will be the closest to the nucleus. This means not only is the attraction forces the greatest, but no other electrons will tend to be between them and the nucleus, “shielding” some of the charge. Removing them will take a lot of energy. So between the 3rd from last and 2nd to last will likely be the largest difference. [external link] …