What is Antineutron?
{{nosources|date=September 2012}} {{Antimatter}} '''Antineutron''' is the [[w:antineutron|antiparticle]] of a neutron. Anti-neutrons were found in 1956 at the University of California, Berkeley. They have the same mass and net charge (0) as the neutrons. The only difference is that they have the opposite [[baryon number]], that is, the [[quark]]s inside the neutrons have opposite spins to the [[antiquarks|anti-quarks]] in the anti-neutrons. Anti-neutrons annihilate on contact with their antiparticle, [[neutrons]]. {{Particles}} {{physics-stub}} [[Category:Subatomic particles]] [[Category:Antimatter]]