3F ā is bigger than F because
1. F ā has one more electron so there is less effective shielding of the nuclear charge.
2. F ā has one more electron which causes greater electron repulsions in the outer orbitals, thus expanding the electron cloud.
3. F ā has one less electron so there is more effective shielding of the nuclear charge.
4. F ā has one more electron which causes less electron repulsions in the outer orbitals, thus expanding the electron cloud.
5. F ā has one less electron so there is less effective shielding of the nuclear charge
