Here is a shortcut to learn Reactivity Series of Metals !!

King  stands for  Pottasium(K)

Napolean  stands for  Sodium(Na)

Came  stands for  Calcium(Ca)

Marching  stands for  Magnesium(Mg)

Along  stands for  Aluminium(Al)

Zambia  stands for  Zinc(Zn)

Following  stands for  Iron(Fe)

Nice  stands for  Nickel(Ni)

Padmini  stands for  Lead(Pb)

He  stands for  Hydrogen(H)

Called  stands for  Copper(Cu)

Her  stands for  Mercury(Hg)

Angel  stands for  Silver(Ag)

Again  stands for  Gold(Au)