Final answer:
According to the reactivity series in class 10 chemistry, Sodium is the most reactive metal.
Step-by-step explanation:
According to the reactivity series in class 10 chemistry, the metal that is more reactive is Sodium. The reactivity series is a list of metals arranged in order of their reactivity. In this series, sodium is at the top, followed by zinc, iron, and copper. Metals higher up in the reactivity series are more easily oxidized and are therefore more reactive.