What particles make up an atom?

The particles that make up the atom. The elementary particles include electrons and a large number of particles, including protons and neutrons, that exist inside the nucleus of atoms. read more

Groups of molecules make up everything that exists, both living and inanimate. Atoms that have lost or gained an electron are called ions. Both the number of electrons and the arrangement of the electrons of an atom contribute to its sensitivity to becoming an ion. read more

The nucleus is made up of protons and neutons. The above answer is incorrect. read more