Physics: Particle Physics 

specific charge

charge/mass

beta minus decay

occurs in nuclei with TOO many NEUTRONS, a neutron decays into a proton, releasing a beta particle and an antineutrino.

strong nuclear force exchange particle

The gluon is the exchange particle

what experiences the strong nuclear force?

Hadrons, the strong nuclear force is responsible for binding baryons together in the nucleus

Which particle doesn’t feel the strong nuclear force?

Leptons, for eg. a positron, a muon

Meson quark structure?

A particle anti particle pair.