Did You Know? Matter

All visible matter in the universe is made from the first generation of matter particles: up quarks, down quarks and electrons.

Quarks are very social and exist only in groups (hadrons) with other quarks.

Meson = 1 quark + 1 antiquark + 1 gluons
(For every particle/matter there is a corresponding antiparticle/antimatter).

Baryon = any group of 3 quarks + gluons

For example:

Proton = 2 up quarks + 1 down quark
Neutron = 1 up quark + 2 down quarks