Question

patterns of reactivity quick check
why does the reactivity of metals increase from right to left on the periodic table? (1 point)
metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
metals on the right have fewer protons, making it harder to attract electrons from other atoms.
metals on the right have more protons, causing valence electrons to be held more strongly.
metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.

Explanation:

Metals on the right have more protons. This leads to a stronger hold on valence electrons. As we move from right to left, the number of protons decreases. So, the hold on valence electrons weakens, and reactivity increases.

Answer:

Metals on the right have more protons, causing valence electrons to be held more strongly.