Discuss the anomalous nature of fluorine.

Explanation

(i) Fluorine is the most reactive element among halogens due to minimum value of F-F bond dissociation energy.
It can form two types of salts with metals. NaF and `NaHF_(2)`.
(iii) AgF is soluble in water but other AgX are insoluble.
(iv) HF attacks glass while others do not.
(v) Fluorine, does not form any polyhalides.
(absence of d - orbitals )
(vi) Fluorine exhibit only negative oxidation state ( highly electronegative ) while other halogens have both +ve and -ve oxidation state.