Which would you predict would be the heaviest and the lightest materials that would be good conductors of electricity?

Graphene, and Silver

Explanation:

A conductor can be defined as the object or material that allows the flow of electrical current in it.

Graphene is a lightest material and it acts as a good conductor of electricity.   The graphene electrons move faster as compared to any other material at room temperature. It allows it to conduct electricity.

Silver is a heaviest material and also exhibit highest electrical conductivity among other metals.

explanation: no but i do not usually comment

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.