Question

As one proceeds down the column of the halogens, the reactivity tends to a) increase because the valence electrons are less attracted to the nucleus b) increases because there are a greater number of protons in the nucleus c) decrease because there are more valence electrons in the atom itself d) decrease because the nucleus exerts a weaker pull on the valence electrons

Answer 1

As one proceeds down the group of halogens, one would find that the reactivity of the elements decreases. This is because the ionic radii increase down the group. And as the ionic radii increase, the nucleus of halogens exerts a weaker pull on the valance electrons.

Thus the correct answer is option d.