Chart: Activity Series of Metals

Activity Series of Metals
Element Oxidation Half Reaction
Most active or most easily oxidized Lithium Li( s ) → Li + ( aq ) + e -
Potassium K( s ) → K + ( aq ) + e -
Barium Ba( s ) → Ba 2+ ( aq ) + 2e -
Calcium Ca( s ) → Ca 2+ ( aq ) + 2e -
Sodium Na( s ) → Na + ( aq ) + e -
Magnesium Mg( s ) → Mg 2+ ( aq ) + 2e -
Aluminum Al( s ) → Al 3+ ( aq ) + 3e -
Zinc Zn( s ) → Zn 2+ ( aq ) + 2e -
Iron Fe( s ) → Fe 2+ ( aq ) + 2e -
Nickel Ni( s ) → Ni 2+ ( aq ) + 2e -
Tin Sn( s ) → Sn 2+ ( aq ) + 2e -
Lead Pb( s ) → Pb 2+ ( aq ) + 2e -
Hydrogen H 2 ( g ) → 2H + ( aq ) + 2e -
Copper Cu( s ) → Cu 2+ ( aq ) + 2e -
Mercury Hg( l ) → Hg 2+ ( aq ) + 2e -
Silver Ag( s ) → Ag + ( aq ) + e -
Platinum Pt( s ) → Pt 2+ ( aq ) + 2e -
Least active or most difficult to oxidiz Gold Au( s ) → Au 3+ ( aq ) + 3e -
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