To move a charged particle from one point to another requires work which is measured in volts. This is why voltage is necessary to push electricity through a wire. Matter is all material in the universe. An atom is a minute unit of matter. Atoms are formed by a combination of subatomic particles.
Subatomic particles are particles smaller than an atom.
Three types of particles occur in atoms all around us. These are the proton and neutron, which form the nucleus at the center of an atom, and the lighter electron outside the nucleus. A proton has a positive electrical charge, an electron has a negative charge, and a neutron has no charge at all. A very important idea is the fact that opposite charges attract, and like charges repel. Conductors, semi conductors, and insulators are important when dealing with electricity.