Question

Which atom contains only two fundamental particles? give
example.
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Answer 1

Explanation:

However, protons and neutrons are only two particles in a large family called hadrons. Unlike the electron, hadrons are not fundamental - they are made up of even smaller particles called quarks.

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Family Particle Fundamental

lepton electron yes

hadron proton no

neutron no

Answer 2

 More recent work has shown that protons and neutrons are composed of quarks. Quarks and Leptons: The two most fundamental types of particles are quarks and leptons.