Why Does Fluorine Have a Higher Ionization Energy Than Iodine?

Answer

Atom electrons in fluorine are strongly bonded and much closer to the positive nucleus compared to Iodine. Fluorine atom also has a fewer electrons compare to iodine. In this sense, fluorine needs more energy to be ionize.
Q&A Related to "Why Does Fluorine Have a Higher Ionization Energy..."
In the periodic table of elements, fluorine and iodine are in the same column, but fluorine is in the second, iodine in the fifth row. That means fluorine has only nine electrons
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It is harder to pull electrons off fluorine because
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It is harder to kick electrons out of inner orbitals. The Highest occupied orbital of F is a 2p, whereas, the HOO in I is the 5p, which is already at higher energy than a 2p. Thus
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1) Neon is a noble gas and as a result it has a noble gas electronic configuration. It is difficult to break that electronic configuration because it is very stable. But Magnesium
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