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a series of metals arranged in ascending or decending order according to their reactivitytowards water and acids is called an activityseries.for e.g. k,Na,Li,Ba,Sr,Ca,Mg,Al,Mn,Zn,Cr,Fe,Cd,Co,Ni,Sn,Pb..etc is a series of metals which are arranged in decending order .

Answer

Activity Series contains a list of all metals describing their potential of reacting with acids and water. Those on the top of the list are highly reactive and those at the bottom are least reactive.The list is as follows-

Li>K> Na > Ca>Mg >Al >Mn>Zn>Fe>Ni>Sn >Pb >H>Cu> Hg> Ag> Au

This list is useful during metal displacement reactions.

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