The standard quark-lepton model

The standard quark-lepton model Quiz

Spec 121–122 · Edexcel International A Level Physics: Quiz

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5 questions, one answer each

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  1. 1. A particle is made of a quark and an antiquark. What is it?

    • A. Baryon
    • B. Lepton
    • C. Meson
    • D. Photon

  2. 2. Which of these is a fundamental particle?

    • A. Proton
    • B. Positive pion
    • C. Neutron
    • D. Electron

  3. 3. What is the lepton number of a positron?

    • A. +1
    • B. 0
    • C. −1
    • D. +2

  4. 4. What did the symmetry of the model predict?

    • A. The existence of the neutrino
    • B. The existence of the top quark
    • C. The existence of the pion
    • D. That photons have mass

  5. 5. Which statement about the neutron and antineutron is correct?

    • A. They have opposite charges
    • B. They have different masses
    • C. They differ in baryon number only
    • D. They are identical in every property

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