Question

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 fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.
metals on the right have more protons, causing valence electrons to be held more strongly.

Explanation:

Metals on the right have more protons, causing valence electrons to be held more strongly. As we move from right to left on the periodic table, the number of protons decreases. Fewer protons mean less positive charge in the nucleus. This results in weaker attraction for valence electrons. Metals tend to lose electrons. When the attraction for valence electrons is weaker (as on the left side where there are fewer protons), it is easier for the metal atoms to lose electrons, increasing their reactivity.

Answer:

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