Which materials are considered good conductors of electricity?

Metals are known to be excellent conductors of electricity due to their unique atomic structure, which allows electrons to move freely. In metals, the outer electrons of atoms are loosely bound and can easily flow when an electric field is applied, making it possible for electricity to pass through them with minimal resistance. This property is utilized extensively in electrical wiring, components, and various devices that require efficient electrical conductivity.

In contrast, plastics, wood, and glass are classified as insulators, meaning they do not allow electric current to flow freely. Insulators have tightly bound electrons, which restrict their movement and prevent electricity from passing through. This is why metals are specifically recognized for their conductive properties in electrical applications.