A-LevelPhysicsParticle physics9702/12 · May/June 2019 · Q401 Mark

There are protons, neutrons and electrons in the simple model of an atom. To which class (group), hadron or lepton, do these particles belong?

Ahadron: electron, lepton: proton and neutron

Bhadron: neutron, lepton: proton and electron

Chadron: proton and electron, lepton: neutron

Dhadron: proton and neutron, lepton: electron

✓ Correct answer

D: hadron: proton and neutron, lepton: electron

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Topic: Particle physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2019 Paper 1 Variant 2, question 40.

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