Related Clues:
- A cat first with cat's first baby?
- Relating to basic particles
- Sort of energy or number
- Sort of bomb, number, or power
- Describing tiny particles
- Wee Thomas is in first class with Charlie on the radio
- Very small volume accompanying N-Z I see announced
- Extremely minute
- Like numbers in the periodic table
- __ energy
- Like some periodic-table data
- Thomas in first class has copyright for very small quantities
- Kind of bomb since the 1940s
- ___ clock
- Thomas in first class has constant pent-up energy