Question

observe the modern periodic table and explain the gradation in reactivity of halogen family ​

Answer 1

reactivity of halogens:

fluorine >chlorine>bromine>iodine

Explanation:

this is because flourine can react with its own group elements i.e Cl, Br and I and form compounds.

it oxidises them

ex. F2+2X- forms X2 + 2F-

thus flourine is more reactive then other halogens.

and the reactivity decreases down tha group

as F>Cl>Br>I

.. hope it helps..