Question

how does the reactivity of the alkali metals change from top to bottom within the group? a the reactivity is constant. b the reactivity decreases. c the reactivity is variable and shows no specific trend. d the reactivity increases.

Explanation:

Alkali metals are in Group 1 of the periodic table. As we move from top to bottom within the group, the atomic size increases, the outermost - electron is farther from the nucleus and is less tightly held, so the reactivity increases.

Answer:

d. The reactivity increases.