AQA A level Physics Particles Quarks and Hadrons

This lesson covers the following specification points from the AQA A level Physics specification:

3.2.1.5 Classification of particles
Hadrons are subject to the strong interaction.
The two classes of hadrons:
baryons (proton, neutron) and antibaryons (antiproton and antineutron)
mesons (pion, kaon).
Baryon number as a quantum number.
The proton is the only stable baryon into which other baryons eventually decay.
The pion as the exchange particle of the strong nuclear force.
The kaon as a particle that can decay into pions.
Strange particles as particles that are produced through the strong interaction and decay through the weak interaction (eg kaons).
Strangeness (symbol s) as a quantum number to reflect the fact that strange particles are always created in pairs.

The lesson also includes AQA multiple choice exam questions to help embed exam practice into lessons.