Which of the following elements is the most reactive?

Group of answer choices

Lithium

Sodium

Potassium

Rubidium

1 answer

Among the elements listed (Lithium, Sodium, Potassium, Rubidium), Rubidium is the most reactive. Reactivity among the alkali metals increases as you move down the group in the periodic table, from Lithium to Rubidium. Therefore, Rubidium, being the lowest in the group, has the highest reactivity.