Leaderboard

.....or try the magnet slide test....the eddy currents in silver ( the best conductor) oppose the magnet and it will slide down very slowly. You have to be careful with alloys- it all depend on what the additive metal does with stopping electrons moving about. If copper is 100 conductivity as a datum, silver is 105. Aluminium is around 71. Brass is a _big_ surprise- mainly copper, but the zinc binds the electrons, so it's only around 30 at best.... Solder- lucky to get 10.....

Ah, Fat Freddy's Cat... My favourite: