Would there be any advantage to adding `n`-type or `p`-type impurities to copper

Options

A. Yes
B. No
C. May be
D. Information is insufficient

Answer

B

Explanation

Pure `Cu` is already an excellent conductor, since it has a partially filled conduction band, furthermore, `Cu` forms a metallic crystal as opposed to the covalent crystals of silicon or germenium, so the scheme of using an impurity to donate or accept an electron does not work for copper. In fact adding impurities to copper decreases the conductivity because an electron does not work for copper. In fact adding impurities to copper decreases the conductivity because an impurity tends to scatter electrons, impeding the flow of current.