Related Clues:

• Discontinued Saturn
• '+' or '-' particle
• Very little bit
• Tiny source of energy
• Altered atom
• Antimatter particle
• It gets smashed
• Subject for Bohr
• Saturn model of 2003-07
• Pax, formerly
• Lepton site
• It's smaller than a molecule
• Suffix with ''invent''
• Bit of matter
• With 41-Down, nuclear device