Explain why the periodic trends for metal and non-metal reactivity are opposites. answer as soon as possible! reward: 10pt

Metal activity : increases down a group bc as nuclear shielding increases and the nucleus’ hold on the valence electrons weakens , therefore easier to remove valence electrons
nonmetal : decreases down a group bc the nucleus ability to gain more electrons weakens due to more nuclear shielding

It’s the energy source of stars