Which of the following particles not considered to be elementary?
A) the electron
B) the electron antineutrino
C) the neutron
D) the muon
E) the tau

Question

Quizplus · Accepted Answer

The neutron is not considered to be elementary because it is composed of quarks (two down quarks and one up quark). The other particles listed (electron, electron antineutrino, muon, and tau) are considered to be elementary because they are not known to have any substructure.

Which of the Following Particles Not Considered to Be Elementary