Are atoms the smallest particles of matter?

The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be divided. We now know that atoms are made up of three particles: protons, neutrons and electrons — which are composed of even smaller particles such as quarks. read more

True or False: Atoms are the smallest particles of matter. False: electrons are the smallest particles of matter. True or False: An atom always has the same number of electrons as neutrons. False: An atom always has the same number of electrons as protons. True or False: The nucleus is at the center of the atom. read more

The name of the smallest particles of matter would be Bosons . But bosons if isolated would not qualify as matter . The answer would appear to be Leptons (specifically the Neutrino-electron) but the answer to this question is probably: Quarks . read more

Leptons and quarks constitute the smallest particles of matter, based on contemporary evidence in the field of particle physics. Traditionally, the atom was considered as the indivisible form of matter. read more