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What is the smallest particle<br>of matter known?

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How many quarks are in<br>protons and neutrons?

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

Yes, there could. Right now, our best evidence says that there are particles inside of neutrons and protons. Scientists call these particles quarks. Our best evidence also shows us that there is nothing inside of an electron except the electron itself.


Mac Mestayer, Staff Scientist (Other answers by Mac Mestayer)

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