2.5 Classification of particles

• What are fundamental particles defined as?

  Basic building blocks
• Match the particle type with its example:

  Charged Lepton ↔️ Electron

  Neutral Lepton ↔️ Neutrino

  Baryon ↔️ Proton

  Meson ↔️ Pion
• Which force do neutral leptons interact through?

  Weak force
• What is the electric charge of charged leptons?

  -1
• Which forces do hadrons interact via?

  Strong, weak, electromagnetic
• Charged leptons have an electric charge of -1
• Bosons mediate the four fundamental forces in nature.


  True
• Fermions cannot occupy the same quantum state
• Baryons are composed of three quarks.
• Neutral leptons only interact via the weak nuclear force.
• The strangeness quantum number is -1 for the strange quark and 0 for all other quarks.


  True
• Match the boson type with its mediated force:

  Photons ↔️ Electromagnetic force

  Gluons ↔️ Strong nuclear force

  W and Z Bosons ↔️ Weak nuclear force

  Higgs Boson ↔️ Mass generation
• Mesons are generally unstable, while baryons can be stable or unstable.


  True
• The Higgs boson is responsible for generating mass in the Standard Model.

  True
• Leptons experience the strong nuclear force.

  False
• Neutrinos have an electric charge.

  False
• Leptons interact via the strong nuclear force.

  False
• Leptons experience the strong nuclear force.

  False
• What fundamental force do leptons not experience?

  Strong nuclear force
• What is the strangeness quantum number for the strange quark?

  -1
• What type of spin do bosons have?

  Integer
• What is the quark composition of a meson?

  Quark-antiquark pair
• Hadrons experience the strong nuclear force.


  True
• What are quarks constituents of?

  Hadrons
• What force do photons mediate?

  Electromagnetic force
• Mesons consist of a quark-antiquark pair, while baryons consist of three quarks
• When a particle and its antiparticle come into contact, they annihilate
• Fundamental particles cannot be broken down into smaller constituents
• Leptons are fundamental particles that do not experience the strong nuclear force
• Fundamental particles are categorized into leptons and hadrons based on whether they experience the strong nuclear force
• The strangeness quantum number is -1 for the strange quark.
• Neutral leptons have an electric charge.

  False
• Neutral leptons interact only via the weak force.

  True
• Match the boson with the force it mediates:

  Photon ↔️ Electromagnetic Force

  Gluon ↔️ Strong Nuclear Force

  W and Z Bosons ↔️ Weak Nuclear Force

  Higgs Boson ↔️ Mass to Other Particles
• Bosons obey Fermi-Dirac statistics.

  False
• What are the two main categories of fundamental particles?

  Leptons and hadrons
• What is the electric charge of the up quark?

  +2/3
• Bosons are fundamental particles that mediate the four basic forces
• What are hadrons made of?

  Quarks
• What is the key difference between a particle and its antiparticle?

  Opposite charge