The two families of fundamental particles out of which all ordinary matter is made are
A)protons and neutrons.
B)leptons and quarks.
C)electrons and neutrinos.
D)quarks and neutrinos.
E)leptons and photons.

Question

Quizplus · Accepted Answer

Leptons and quarks are the two families of fundamental particles out of which all ordinary matter is made according to the Standard Model of particle physics. Leptons include electrons, muons, and tau particles, as well as their corresponding neutrinos. Quarks include up, down, charm, strange, top, and bottom particles. Protons and neutrons are made up of quarks, while electrons are leptons. Therefore, option B is the best choice.

The Two Families of Fundamental Particles Out of Which All