Question

Why does fluorine show anomalous behaviour in ‘17 group’ elements?

Answer 1

Fluorine, the first member of group 17, differs in properties from the other members of the group. The anomalous behaviour of fluorine is due to the following reasons:

1. Small atomic size.
2. High electronegativity.
3. Absence of d-orbitals in valence shell.
4. Low F-F bond dissociation enthalpy.