Francium is the biggest element with the lowest IE and EN. It has the largest atom and the valence electrons are farther from the nucleus, so it would require less energy to remove the valence electrons in order to make the amount of atoms balanced. It also has the lowest EN, since it doesn't want to gain anymore electrons due to the large size of the atom. In the periodic table, it has most energy and the fewest protons in its nucleus causing it to have the lowest IE.
Helium is the smallest element with the highest IE. It requires a lot of energy to remove its valence electrons since it already has a full shell and doesn't need to gain or lose anymore electrons. The small size of the electron in its outermost shell are most attracted to its nucleus, which explains the small size and why it has the highest IE.
Noble Gases don't have EN values. Since they already have full shells, making them stable. So they don't need to gain or lose any valence electrons. They are unreactive.
Fluorine has the highest EN. It is the smallest atom who's valence shell only needs 1 more VE to become stable. Smallest element that isn't a noble gas, so it has the great attraction for an another electron.
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