Question

iIn a group, the reactivity of metals increases while those of non-metals decreases. Explain.

Answer 1

as reactivity depends on the electrons
further the electrons from the center the greater the reactivity
as the elections of metals are more further from the center then the electrons of non-metal;
and this distance is keep on increasing in case of metals and decreasing in case of non-metal.
so,
reactivity of metals increases while those of non-metals decreases