Which of the following best defines the term "Conductor"?

The term "Conductor" is best defined as materials that permit the free flow of electrons from atom to atom. This definition emphasizes the characteristic properties of conductive materials, such as metals like copper and aluminum, which have free electrons that can move easily within them. This ability to allow electrons to flow is crucial for conducting electricity, making these materials essential in electrical applications such as wiring and circuitry.

In contrast, the other options describe different concepts related to electricity but do not correctly define what a conductor is. For example, the first option refers to ions, which are charged particles, rather than materials that allow the flow of electricity. The second option describes an electrical device, which is broader and encompasses various elements that utilize electricity rather than being specific to conductors. The third option addresses the concept of electric current, which relates to the flow of electrons but does not define what a conductor itself is. Thus, the correct choice accurately captures the essence of conductive materials in the context of electricity.