AQA A Level Physics 3.2.1.5 Classification of particles

What are the two classes of hadrons?

• Baryons

• Electrons

• Neutrinos

• Photons

• Mesons

Baryons

• Proton

• Electrons

• Neutrino

• Pion

• Neutron

Mesons

• Proton

• Kaon

• Neutrino

• Pion

• Neutron

A hadron can have the following baryon numbers:

• 0

• 1

A lepton can have the following lepton numbers:

A strange particle can have the following strangeness:

During a particle interaction, the baryon number must be...

• conserved

• increased

• decreased

• created

• destroyed

During a particle interaction, the lepton number must be...

• conserved

• increased

• decreased

• created

• destroyed

During a particle interaction, the lepton number must be...

• conserved only in strong interactions

• conserved only in weak interactions

• conserved in all interactions

There is only one stable baryon. Unstable baryons will eventually decay into the...

• neutron

• proton

• pion

• kaon

• electron