| Radioactive Blondie song? | 25 |
| Of interest to some physicists | 30 |
| Like the modern age | 19 |
| Like superprecise clocks | 24 |
| Like some reactors | 18 |
| Like some precise clocks | 24 |
| Like some periodic-table data | 29 |
| Like some hot wings, hyperbolically | 35 |
| Like some controversial plants | 30 |
| Like some clocks and bombs | 26 |
| Like numbers in the periodic table | 34 |
| Like nuclear energy | 19 |
| Kind of weight or number | 24 |
| Kind of number or weight | 24 |
| Kind of number or energy | 24 |
| Kind of number or clock | 23 |
| Kind of mass or theory | 22 |
| Kind of bomb since the 1940s | 28 |
| Kind of age or number | 21 |
| Extremely minute | 16 |
| ___ number (proton count) | 25 |
| ___ FireBall (hot candy) | 24 |
| __ reactor | 10 |
| __ energy (nuclear power) | 25 |
| Post-Manhattan Project era | 26 |
| Modern times | 12 |
| It was spawned by the Manhattan Project | 39 |
| It started in 1945 | 18 |
| It followed the Manhattan Project | 33 |
| Explosive time in history? | 26 |
| Era that began with a blast? | 28 |
| Test at Bikini Atoll | 20 |
| Couple in the news in 1945 | 26 |
| Bikini tests | 12 |
| 1963 international treaty subjects | 34 |
| Tiny particles | 14 |
| Small creatures | 15 |
| Fragment | 8 |
| Disintegrate | 12 |
| Nuke | 4 |
| Reduce to mist | 14 |
| Spray, in a way | 15 |
| Mist-ify? | 9 |
| Reduce to fine particles | 24 |
| Reduce to a mist | 16 |
| Reduce to a fine spray | 22 |
| Make a mist of | 14 |
| Reduced to spray | 16 |
| Made into a spray | 17 |
| Like turbojet fuel | 18 |
| Smidgens | 8 |
| Bits | 4 |
| Little bits | 11 |
| Jots | 4 |
| Particles | 9 |
| Tiny bits | 9 |
| Smithereens | 11 |
| Physics units | 13 |
| Small bits | 10 |
| Molecule parts | 14 |
| Itsy-bitsy bits | 15 |
| Minute quantities | 17 |
| Itty bits | 9 |
| Parts of molecules | 18 |
| Minute particles | 16 |
| Tiny quantities | 15 |
| Molecule makeup | 15 |
| Whits | 5 |
| Units in physics | 16 |
| Tiny things | 11 |
| Physics particles | 17 |
| Molecule components | 19 |
| Chemistry subject | 17 |
| Physics bits | 12 |
| Monads | 6 |
| Molecular bits | 14 |
| Energy sources | 14 |
| Small bits of matter | 20 |
| Molecule makers | 15 |
| Molecular components | 20 |
| Mighty mites | 12 |
| Chemistry 101 models | 20 |
| They get smashed | 16 |
| Small parts | 11 |
| Molecule's makeup | 21 |
| Molecule constituents | 21 |
| Molecular makeup | 16 |
| Minuscule bits | 14 |
| Itsy bits | 9 |
| Fermi's bits | 16 |
| Components of molecules | 23 |
| Bitty bits | 10 |
| What's the matter? | 22 |
| Tiny elemental components | 25 |
| Tiny bits of matter | 19 |
| They split when smashed | 23 |
| They might get smashed | 22 |
| Smashable items | 15 |
| Physicist's studies | 23 |
| Particles invisible to the naked eye | 36 |