Question

Amongst the elements of group 17, fluorine is most reactive owing to it's :

• A. High Electronegativity
• B. Small size of the atom
• C. Low dissociation enthalpy of F-F bond
• D. All of the above

Answer 1

The correct option is C Low dissociation enthalpy of F-F bond

Among the elements of group 17, fluorine is the most reactive owing to its electronegativity and small size of atom. Also extremely high oxidizing power and low dissociation energy of $F-F$ bond is responsible for its reactivity.