Defining electrostatics in terms of electric charge is static.
Define and explain why an object is electrically neutral, in terms of protons and electrons which are the fundamental particles of all atoms. Show that by rubbing a balloon on your hair, the balloon becomes negatively charged due to picking up electrons from the neutral hair. The hair has now become positively charged due to the loss of electrons. The opposite charges attract, the hair stands on end, or bits of tissue are attracted to a charged ruler or balloon for the same reason. Stress that only electrons are mobile, not protons. Relate the electric force to the force of gravity in terms of strength and direction.