Related Clues:

• It may lose or gain electrons
• It's a small thing
• Democritus' unit
• Molecule piece
• Confess at the end?
• Chemist's concern
• Small matter
• Tiny particle
• Act closer?
• Subject of a split
• Physicist's particle
• Energy source in a small package
• Cyclotron input
• 'And -- the opposite shore ...'
• Physics particle with no strong force