A. Atoms are made up of small particles that are electrically charged. Protons a. Protons are positively charged and are contained in the nucleus of an atom.
Protons repel each other.
Protons are attracted to electrons. Neutrons a. Neutrons have no charge and are contained in the nucleus of an atom. Electrons a. Electrons are negatively charged and surround the nucleus of an atom. Electrons repel each other. Electrons are attracted to protons.