Question

Why reactivity of halogen towards hydrogen decreases down the group?

Answer 1

Answer:

This is due to the fact that atomic radius increases in size with anincrease of electronic energy levels. This lessens the attraction for valence electrons of other atoms, decreasing reactivity. Thisdecrease also occurs because electronegativity decreases down agroup; therefore, there is less

electron "pulling."

Explanation:

I hope this will help u........plz mark it as a brilliant ans....