The ionization energy of fluorine is 1681 kJ/mol (the first) and the ionization energy of iodine is 1008,4 kJ/mol.
Fluorine has the largest first ionization energy among the halogens.
The element with the highest first ionization energy in group 14 is carbon.
Neon
fluorine bromine chlorine
Cl
Fluorine has the largest first ionization energy among the halogens.
Ionization energy decrease down the group.So in halogens,Fluorine has highest 1st ionization energy.
Halogens, specially fluorine
Carbon has the highest ionization energy
lithium
The element with the highest first ionization energy in group 14 is carbon.
Neon
fluorine bromine chlorine
The first ionization energy is 1681 kJ/mol.
Cl
The ionization energy increase from sodium to fluorine.
Because fluorine's size is lower than that of iodine, it has a greater ionization energy than iodine. Fluorine, on the other hand, appears to have a smaller shielding effect. As a result, fluorine's nucleus attracts more valence electrons than iodine's.