Electricity is the flow of electrons through a conductor. Electricity is based on the principle that all matter has negatively and positively charged particles within its atoms.
All atoms are divided into protons, electrons and neutrons. Protons are positively charged, and electrons are negatively charged. Electrons are important for conducting electricity. Most metals are good conductors because they allow electricity to flow through them; they have free electrons, meaning the electrons can move on their own, away from their atoms. Therefore, the current of electricity is just the movement of these free electrons in a certain direction. Other materials, such as plastic or wood, do not conduct electricity very well because they do not have free electrons.