Gold is least reactive.
gold
Silver nitrate does not precipitate in this case; elemental silver does. In this reaction, silver nitrate reacts with copper to form elemental silver and copper II nitrate. The silver, which is a metal, is insoluble in water.
Copper metal does not have enough reactivity to react with sulfuric acid.
Copper is an inert metal and reacts with those acids only which have oxidizing ability as HNO3.
Copper is reactive even to the normal mosit air,it is a electron deficient metal so reacts to accept electrons and come to a noble state.it is used as electrode,electrolyte as solution etc.
copper will replace silver in silver nitratesolution will precipitate silver and oxidize copper turning to copper nitrate
iron
Silver nitrate does not precipitate in this case; elemental silver does. In this reaction, silver nitrate reacts with copper to form elemental silver and copper II nitrate. The silver, which is a metal, is insoluble in water.
Metals in the reactivity series from aluminium to copper react with oxygen in the air to form the metal oxide. Aluminium and Zinc reacts very quickly, Iron reacts slowly at room temperature. Tin, Lead and Copper reacts with Oxygen in air when heated. Silver, Gold and Platinum do not react with Oxygen in air
Copper metal does not have enough reactivity to react with sulfuric acid.
copper
Copper is an inert metal and reacts with those acids only which have oxidizing ability as HNO3.
chemical
Alloy
The metal might be copper. When copper is heated, it reacts with oxygen in air forming copper oxide which is black in colour.
Both are silver plated, but silver on copper tells you what kind of metal is used as an underlay. Silver plated copper is more valuable than silver on a white metal or zinc underlay.
Copper is reactive even to the normal mosit air,it is a electron deficient metal so reacts to accept electrons and come to a noble state.it is used as electrode,electrolyte as solution etc.
copper will replace silver in silver nitratesolution will precipitate silver and oxidize copper turning to copper nitrate