Question

Even after twenty years of use, most quarters have the same shiny appearance that they did when they were minted. Most pennies, however, have dulled considerably. What does this suggest about the position of the metal used to make quarters and the metal used to make pennies on the activity series?

Answer 1

clearly, copper oxidizes faster, so ...

Answer 2

Yes, copper metal is easier to oxidize than silver metal. In regard to the position in the activity series, Cu is above Ag in the series. The rate of reaction, however, is not a function of a metal's position in the table.