These electrons then flow through an external circuit where they can do work.

I was later told that the electrons really did not flow in the conductors.

It is a set of electrons flowing through a wire, often called electric current.

When electrons flow through a conductor, a magnetic field is produced.

The electrons will then flow in an opposite direction.

At present, they are useful only for studying the physics of how electrons flow through molecules.

Useful work is extracted when electrons flow through a closed external circuit.

The metal creates the connections between the different components that allow electrons to flow from one component to another.

Because the valence band is so nearly full, its electrons are not mobile, and cannot flow as electrical current.

When there is a path that goes from the negative to the positive terminal, you have a circuit, and electrons can flow through the wire.