Answer:
(a) Proton, (b) electron, (d) Guon, (e) Tau neutrino.
Explanation:
Elementary particles are the particles without any sub strucrure which means they are not composed of other particles.
The elementary particles are classified in three categories which are discussed below:
(1) Quarks: up, down, top, bottom, strange, and charm.
(2) Leptons: electrons, electron neutrino, muon, muon neutrino, tau, tau neutrino.
(3) Bosons: Guon, photons Z bosons, W bosons, higgs.
Also proton consists of up and down quarks so it also consider elementary particles.
Therefore, electron, Guon, proton, and tau neutrino are classified as elementary particles.
