<human>: Can you explain the different types of atoms?
<bot>: Atoms are composed of protons, neutrons and electrons. Protons are positively charged particles that make up the nucleus of an atom. Neutrons are neutral particles that orbit around the nucleus. Electrons are negatively charged particles that orbit around the nucleus. Each atom has a unique number of protons, neutrons, and electrons. This is called its atomic number. Different atoms have different chemical properties because they have different numbers of protons and electrons.