Question

How does reactivity changes on moving down in goup 17?

Answer 1

Reactivity will become more moderate, and oxidizing potential will greatly reduce....

Explanation:

Elemental fluorine is the most reactive element on the Periodic Table...the lower halogens, `Br_2`, `I_2` are still good oxidizing agents, but not so potent as fluorine....look at the half-equations...

`1/2F_2+e^(-) rarr F^(-)` `;E^@=+2.87*V`

`1/2Cl_2+e^(-) rarr Cl^(-)` `;E^@=+1.36*V`

`1/2Br_2+e^(-) rarr Br^(-)` `;E^@=+1.07*V`