#6.4.2a
particles and antiparticles; electron–positron, proton-antiproton, neutron-antineutron and neutrino-antineutrino
#6.4.2b
particle and its corresponding antiparticle have same mass; electron and positron have opposite charge; proton and antiproton have opposite charge
#6.4.2c
classification of hadrons; proton and neutron as examples of hadrons; all hadrons are subject to both the strong nuclear force and the weak nuclear force
#6.4.2d
classification of leptons; electron and neutrino as examples of leptons; all leptons are subject to the weak nuclear force but not the strong nuclear force
#6.4.2e
simple quark model of hadrons in terms of up (u), down (d) and strange (s) quarks and their respective anti-quarks
#6.4.2f
quark model of the proton (uud) and the neutron (udd)
#6.4.2g
charges of the up (u), down (d), strange (s), anti-up (\(\bar{u}\)), anti-down (\(\bar{d}\)) and the anti-strange (\(\bar{s}\)) quarks as fractions of the elementary charge e
#6.4.2h
beta-minus (β–) decay; beta-plus (β+) decay
#6.4.2i
β– decay in terms of a quark model;
\(d ⟶ u + ^0_{-1}e + \bar{ν} \)
#6.4.2j
β+ decay in terms of a quark model;
\(u ⟶ d + ^0_{+1}e + ν \)
#6.4.2k
balancing of quark transformation equations in terms of charge
#6.4.2l
decay of particles in terms of the quark model.