In a reactivity series, which metal is more reactive than lead but less reactive than potassium?

In a reactivity series of metals, the reactivity is based on how easily a metal will lose electrons to form positive ions. Lead is positioned in the middle of the reactivity series, while potassium is one of the most reactive metals.

Zinc is known for being more reactive than lead, making it a possible candidate. Aluminum is also more reactive than lead and less reactive than potassium, as it typically reacts with oxygen and can displace lead from compounds, but it often forms a protective oxide layer that can inhibit its reactivity. Iron, on the other hand, is generally considered less reactive than aluminum.

In this context, when we analyze the reactivity of metals in relation to lead and potassium specifically, aluminum fits the criteria of being more reactive than lead and less reactive than potassium. This situates aluminum properly within the reactivity series, supporting it as the correct answer.