Question

Which of the following element is most reactive?

(a) Chlorine

(b) Fluorine

(c) Bromine

(d) Iodine

The question was posed to me in my homework.

Enquiry is from P-Block in chapter P-Block Elements of Chemistry – Class 12

Answer 1

Right choice is (b) Fluorine

For explanation I would say: Of all the halogens, fluorine is the most reactive and hence is also called super halogen. Fluorine is also the most electronegative (EN = 4.0) element in the periodic table. This indicates that fluorine has a high tendency to gain electrons from other elements with lower electronegativities.