Question

What do you mean by reactivity series of metals?

Answer 1

Metals' reactions with oxygen, water and acids prove that they differ in reactivity. Thus, they can be arranged in an order of their reactivity. The series of arrangement of metals in an order of decreasing reactivity is called the reactivity series.

Highly reactive metals (potassium, sodium) are placed at the top of the reactivity series, whereas the least reactive metals (silver, gold) are placed at the bottom of the reactivity series.