Electric charge is a basic property of electrons, protons and other subatomic particles. Electrons are negatively charged while protons are positively charged. Things that are negatively charged and things that are positively charged pull on (attract) each other. This makes electrons and protons stick together to form atoms. Things that have the same charge push each other away (they "repel" each other). This is called the "Law of Charges". It was discovered by Charles-Augustin de Coulomb. The law that describes how strongly charges pull and push on each other is called Coulomb's Law.