1
Q
Define elementary particle
A
a particle whose substructure is unknown
2
Q
Define baryons
A
composite subatomic particles made up of three quarks
2
Q
Define antiparticle
A
a particle with the same mass and opposite charge and/or spin to a corresponding particle, for example positron and electron
3
Q
Define meson
A
subatomic particles composed of one quark and one antiquark
