Related Clues:

• Quark/antiquark pairs
• Pions, e.g.
• Plus and minus items
• Atoms with a charge
• Carbonium and others
• Quarks + antiquarks
• Cyclotron particles
• Charged things
• Ammonium particles, e.g.
• Particles with charges
• Na+ and Cl-
• Plasma components
• H+ and ClÖ
• They're never free of charge
• Some atoms