How many quarks are in a proton? How...

| Return to the Question and Answer Archive Index Page |

How many quarks are in a proton? How many quarks are in a neutron?

Protons and neutrons each contain three quarks. A proton is composed of two 'Up' quarks and one 'Down' quark while neutrons are composed of one 'Up' quark and two 'Down' quarks.

Author:

Steve Gagnon, Science Education Specialist (Other answers by Steve Gagnon)

All About Atoms

What is the smallest particle of matter known?

Could there be anything smaller inside of an electron or inside of a neutron or a proton?

What kinds of quarks are protons and neutrons made of? What was the old name for the Top and Bottom quark?

What is the charge of an up quark and the charge of a down quark? How many quarks make up a proton and a neutron?

Are quarks confineable for study?

| Return to the Question and Answer Archive Index Page |