Question

Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. How does this help explain the difference in the reactivity of metals within a group?

Answer 1

Answer:

when we move down the group reactivity is decreases due to increase in size

Answer 2

Answer: as we go down the group the ionisation energy decreases

Explanation:

The ionisation energy is d energy required to remove the most loosely held electron or the valence electron . The lesser the ionisation energy more reactive the element