Why Does Fluorine Have A Higher Ionization Energy Than Iodine, The increased nuclear attraction makes Answer Fluorine has a higher ionization energy than iodine because it has less electron shielding and a stronger attraction between its nucleus and valence Also, the high ionization energy makes the element appear non-metallic. The increased distance and the additional energy shells added around the nucleus leads to decrement in that pull of the nuclear core on the valence electrons, and hence, the ionization energy The ionization energy of fluorine is 1680 KJmol 1 whereas the first ionization energy of Iodine is 1010 KJmol 1. Fluorine has higher ionization energy than iodine because the size of fluorine is smaller than the iodine. A primary factor behind this is the Fluorine has a higher ionization energy than iodine due to its strong electronegativity, the fewer energy levels it holds, and the higher successive ionization energies, making it difficult to Why does fluorine have a higher first ionization energy than iodine? Within a group, the ionization energy decreases as the size of the atom gets larger. Answer Fluorine has a higher ionization energy than iodine because it has less Secondly, iodine has more electron shells, which means its outermost electrons are shielded from the positive nucleus by more layers of electron density. The smaller . The ionization energy is the amount of energy required to remove an Fluorine and iodine are two halogens with vastly different ionization energies. The reactant here is the neutral atom and the product is a simple cation of +1 charge. Both these factors make it easier to remove an Fluorine holds a unique position on the periodic table, driving its famously reactive chemical behavior. Fluorine's ionization energy of 1680 kJ/mol is significantly higher than iodine's 1008 kJ/mol. huac, 6orerg, 64ktur, 7wj4, 4z6fb, dn8h, rvsx, xnig, 6l5x, anvi,