The reactivity series of metals, also known as the activity series, refers to the arrangement of metals in the descending order of their reactivities.
The below table illustrates the reactivity of metals from high order to low order.
| Symbol | Element |
| K | Potassium ( Highly Active Metal) |
| Ba | Barium |
| Ca | Calcium |
| Na | Sodium |
| Mg | Magnesium |
| Al | Aluminium |
| Zn | Zinc |
| Fe | Iron |
| Ni | Nickel |
| Sn | Tin |
| Pb | Lead |
| H | Hydrogen |
| Cu | Copper |
| Hg | Mercury |
| Ag | Silver |
| Au | Gold |
| Pt | Platinum |