* Metallic Bonding: Metals have a unique type of bonding where their outer electrons are loosely held and can move freely throughout the structure. These "delocalized" electrons act like a sea of charge carriers, allowing electricity to flow easily.

* Nonmetals: Nonmetals, on the other hand, have tightly bound electrons. They don't have free electrons to carry an electrical current, making them poor conductors in their solid state.

Exceptions:

* Graphite: Although considered a nonmetal, graphite is an exception. It has a layered structure where electrons can move freely within each layer, making it a good conductor of electricity.

Let me know if you have any other questions!