Anomalous behaviour of flourine

Anomalous Behaviour of Fluorine

Fluorine exhibits anomalous behavior compared to other Group 17 elements (halogens). Below are the key characteristics that make fluorine unique:

Fluorine is the most reactive halogen due to its low bond dissociation energy.
It differs from other halogens because it:
- Has the smallest atomic size
- Has the highest electronegativity
- Lacks d-orbitals in its valence shell
It exhibits only a negative oxidation state of -1, unlike other halogens that show +1, +3, +5, and +7 as well.
Due to its strong electronegativity and small size, hydrogen fluoride (HF) has a very strong bond, making it less acidic than other hydrogen halides.
It cannot form polyhalide ions because of the absence of d-orbitals, unlike other halogens which do form them.