The correct listing of the following three categories of particles, in order of increasing number of particles in the groups, is
A) baryons, leptons, mesons.
B) mesons, baryons, leptons.
C) leptons, mesons, baryons.
D) baryons, mesons, leptons.

Question

Quizplus · Accepted Answer

Leptons, mesons, and baryons are categories of subatomic particles. Leptons are fundamental particles and include electrons, muons, taus, and their corresponding neutrinos. Mesons are made of a quark and an antiquark. Baryons, including protons and neutrons, are made of three quarks. The complexity and composition of these particles suggest an increasing number from leptons to mesons to baryons.

The Correct Listing of the Following Three Categories of Particles