On the ionization energy vs. atomic number graph, the peaks, which are Noble Gases, gradually get smaller. Which statement below would best explain that pattern?

A Each successive element on the peaks has fewer electrons and that would make ionization energy less.

B Each element has more electrons and they are in levels that are farther from the nucleus so it takes less energy to remove them.

C These elements are getting bigger nuclei because they have more protons. This would create a stronger pull on the electrons which would make the ionization energy less.

D All of the above

  1. I think B is the best answer although it isn't complete. The atoms ARE getting larger, the outer electrons ARE farther away AND there are more shielding electrons between the nucleus and the outer electron so it is easier to remove the outer electron.

    posted by DrBob222

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