Here's why:
* Aluminum is a very good conductor of electricity, often used in electrical wiring.
* Zinc is a decent conductor, used in batteries.
* Tin is a fair conductor, used in solder.
* Lead is a poor conductor of electricity. It's often used in batteries, but primarily for its resistance to corrosion.
Electrical conductivity generally increases with the number of free electrons available to carry current. Lead has fewer free electrons than the other metals listed, making it a less efficient conductor.
