Possible Clues:

• Atoms
• 'There's a small charge for N x X, it seems (4)'
• Atomic bits
• Table salt is composed of them
• They're charged and can be exchanged
• Charged-up atoms
• Is about on charge a little of them
• There's a small charge for NNNNNNNNNN
• F- and others, in chemistry class
• Dissociation products