This document provides an introduction to electron theory and electricity. It explains that electricity is caused by the flow of electrons and defines electrons as negatively charged particles that orbit the nucleus of atoms. The document discusses how electrons can become free or bound, and how atoms become ions through gaining or losing electrons via ionization. It also briefly introduces static electricity and how rubbing certain materials can cause the transfer of electrons, resulting in an attraction between objects. The overall purpose is to explain the fundamentals of electricity by describing the structure of atoms and the role of electrons.