Question

Why do Halogens decrease in reactivity?

Answer 1

Halogen:

1. Halogen is a salt-forming compound.
2. The Group 7 elements are called halogens.
3. They are placed vertically in the column, second from the right in the periodic table.

Change in reactivity while going down in the group:

1. Generally, metal reactivity decreases from left to right cross periods and increases down the group.
2. Non-metallic elements increase from left and right and decrease down the groups.
3. Halogen is a non-metallic element that is found in Group-17 and it gets less reactive going down the group as the Group-17 elements react by gaining an electron.
4. One of the other reasons that the Halogens decrease in reactivity down the group as the size of the atomic radius increases with an increase in the electronic energy level.
5. As, down the group, the amount of electron shielding increases, and the electron becomes less attached to the nucleus.