What happens to the reactivity of nonmetals within a group from top of the group to the bottom?

As you go down a group, the atoms get bigger. The bigger the atom, the more unstable it is. The more unstable it is, the more reactive the atom will be. So, as you go down a group, the nonmetals will become more reactive.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter