What is meant by reactivity series of metals ? What is the reason for different reactivities of metals ?

What is meant by reactivity series of metals ? What is the reason for

1.	What is meant by reactivity series of metals ? What is the reason for different reactivities of metals ?
Answer» Solution :`{:("Electrolysis","Reduction using carbon","FOUND in NATIVE place"),("K","Zn","Ag"),("Na","Fe","Au"),("Ca","Pb",),("MG","Cu",),("Al",,):}` On the basis of reactivity of different metals with oxygen, water and acids as well as displacement reactions, the metals have been arranged in the decreasing order of their REACTIVITIES. The arrangement of metals in order of decreasing reactivities is called reactivity series or activity series of metals. Reasons for different reactivities. In the activity series of metals, the basis of reactivity is the tendency of metal to lose electrons. If a metal can lose electrons easily to form positive ions, it will react readily with other substances. Therefore, it will be reactive metal. On the other hand, if a metal LOSES electrons less rapidly to form a positive ion, it will react slowly with the other substances.