normally there are as many electrons as protons in the atom.

A positive ion is an atom with more electrons than protons

a free electron is one that is detached from an atom.

an electric current is created by the movement of negative ions.

The movement of negative electrical charges through a conductor.

It is measured in watts.

It only flows in one direction.

It is used to measure the electric charge.

It is a reserve of chemical energy that can be transformed into electrical energ

It converts mechanical energy to electricity.

It changes direction at regular intervals.