- FF bond is not a strong bond.
- The heavy repulsion between the lone electron pairs of two fluorine atoms makes the F–F bond weak.
- Additionally, because fluorine has very low ionization energy, it can readily react with other elements and disrupt the F–F bond.
- Compared to the other group 17 elements, the bond length between the two F atoms is longer.
- The FF bond is consequently weak.
Hence, the FF bond is not strong.