How do we know that protons and neutrons are not fundamental particles?

protons and neutrons are not fundamental particles as they composed of up and down quarks.

Why is a neutron a fundamental particle?

The proton and neutron are held together by the strong nuclear force. Protons and neutrons are not fundamental as they consist of sets of point-like particles called quarks held together by the exchange of messenger particles called gluons. Current understanding suggests that quarks and gluons have no sub-structure.

Are electrons protons and neutrons fundamental particles?

Protons and neutrons are made up of fundamental particles of matter called quarks. Electrons are another type of fundamental particles of matter called leptons. Bosons are fundamental particles that carry forces between fundamental particles of matter.

Is a positron a fundamental particle?

Positron

Cloud chamber photograph by C. D. Anderson of the first positron ever identified. A 6 mm lead plate separates the chamber. The deflection and direction of the particle’s ion trail indicate that the particle is a positron.
Composition	Elementary particle
Generation	First
Interactions	Gravity, Electromagnetic, Weak

Which of the following is not a fundamental particle?

Electrons, protons and neutrons are fundamental particles, whereas alpha particle is not a fundamental particle.

How do we know electrons are fundamental?

The standard model of particle physics suggests that there are fundamental particles called leptons and quarks which are the basic building blocks of matter, i.e., they are seen as the “elementary particles”.

Which of the following is not a fundamental particle proton positron neutron electron?

Answer: Alpha particle is not a fundamental particle.

Which of the following is not a fundamental particle proton neutron electron?

Is a lepton a fundamental particle?

In particle physics, a lepton is an elementary particle of half-integer spin (spin 1⁄2) that does not undergo strong interactions….Generations of Matter.

Fermion categories	Type	Leptons (color-free)
Subtype	neutral
Elementary particle generation	First	electron neutrino
Second	muon neutrino