| 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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