Wow, that is a tough question.
If you had to look at the Periodic Table, you will see that copper is in fact a metal :o. There are however other metals that conduct electricity far better than copper. These metals unfortunately are not as common and thus as inexpensive as copper, thus are not widly used.
Neither. Conducting electricity does not change copper either way.
Tar is a conductor of electricity. This is because tar contains carbon black. Carbon though not a metal is capable of conducting electricity.
Generally copper, because it is cheap and also conducts electricity.
Well metal elements are usually the best conductors of electricity
Most transition metals are good conductors of electricity, copper one of the cheapest and best conductors. Because of its high density, electrons can flow from molecule to molecule without expending excessive energy. Copper is used in many things for conducting electricity. For example, in electric motors, copper wire is spun around a metal core to create electricity with the spinning of it within a magnet.
Copper
Neither. Conducting electricity does not change copper either way.
Copper is a better conductor of not only electricity, but also heat. This is because copper is a metal.
The better a metal conducts electricity, the better it is at conducting heat also. In order from worse to better, Carbon, Iron, Aluminum, Copper, Silver. But any metal is going to be fair, it is why metal is colder when you touch it, because it conducts heat better.
Usually copper wires are preferred as a conductor. Or some other metal.
Silver
In general, the better a metal is for conducting heat, the better it is for conducting electricity. Aluminum is better at both than stainless steel, Copper is better than aluminum, silver is better than copper. The same is not true for non-metals. Some thing are equally good, or bad, at both, and others are good at one and not the other. One of the best conductors of heat is diamond, which is why they usually feel cool to the touch, but diamond is an electric insulator.
Yes. At normal temperatures copper conducts electricity better than almost any other metal; silver is slightly better.
Silver is the best conducting metal, both thermally and electrically. It is followed by Copper, then Gold, then Aluminum.
It depends on the type of metal. The ability of a metal to conduct electricity is one trait that identifies a metal. For example, copper can conduct electricity very well (better than most metals).
copper
Silver is the best metal which is the conductor of electricity and heat. Silver is the best electricity conducting element, but not the best heat conductor. Carbon(Diamond) and Helium(Helium II state) are even better conductors of heat.