Quantum Chromodynamics/Pions
Pions are particles that have 2 quarks of opposite charges and opposite "colours" or quantum state to allow it to exist, it "carries" quarks around the atom and plays an important role in Quantum Chromodynamics
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Quark_structure_pion.svg/220px-Quark_structure_pion.svg.png)
Pions are particles that have 2 quarks of opposite charges and opposite "colours" or quantum state to allow it to exist, it "carries" quarks around the atom and plays an important role in Quantum Chromodynamics