| Threesome in a water molecule | 29 |
| They're split and smashed | 29 |
| They're in their element | 28 |
| They're all that matter | 27 |
| They may be smashed or split | 28 |
| They can be split or charged | 28 |
| Supercollider particles | 23 |
| Quantum mechanics subjects | 26 |
| Molecular building blocks | 25 |
| Links in certain chains | 23 |
| John Dalton theorized on them | 29 |
| It's tough to split them | 28 |
| Focus of stereochemistry | 24 |
| Elemental building blocks | 25 |
| Electron-swathed nuclei | 23 |
| Diminutive energy sources | 25 |
| Composition of everything | 25 |
| Chemistry class models | 22 |
| Chemical building blocks | 24 |
| Building blocks of matter | 25 |
| What some heavy things weigh? | 29 |
| Fell like ___ of bricks | 23 |
| "This weighs ___!" | 28 |
| Went over like ___ of bricks | 28 |
| Hit like ___ of bricks | 22 |
| Hit ____ (batted well) | 22 |
| Fell like --- of bricks | 23 |
| Egyptian solar disk: var. | 25 |
| "This weighs ---!" | 28 |
| "This weighs __!" | 27 |
| "___ of bricks" | 25 |
| 'This weighs --!' | 25 |
| Lacking a musical quality | 25 |
| Like much modern music | 22 |
| Like some modern music | 22 |
| Like Schoenberg's music | 27 |
| Lacking a key, musically | 24 |
| Without key, musically | 23 |
| Unkeyed, as some compositions | 29 |
| Really hard to hum along to | 27 |
| Like some 20th-century music | 28 |
| Like music without a key | 24 |
| Like much Schoenberg music | 26 |
| Like Alban Berg's music | 27 |
| Lacking a key, in music | 23 |
| Discordant to many an ear | 25 |
| Without a key, in music | 23 |
| Off the scale, in a way | 23 |
| Like some Oriental music | 24 |
| Like some Hindemith works | 25 |
| Like Schoenberg's works | 27 |
| Like much avant-garde music | 27 |
| Like much 20th-century music | 28 |
| Like Alban BergÂ’s music | 27 |
| Like a von Webern composition | 29 |
| Lacking a signature, say | 24 |
| Lacking a mode in music | 23 |
| In no particular musical key | 28 |
| Hard on the ears musically | 26 |
| Ear-jarring, musically | 22 |
| Describing some modern music | 28 |
| "This instant!" | 25 |
| "This minute!" | 24 |
| "And step on it!" | 27 |
| When penitents convene? | 23 |
| Send a note of apology | 22 |
| Apologize and then some | 23 |
| Send a note of apology, e.g. | 28 |
| Do more than apologize | 22 |
| What Jews do on Yom Kippur | 26 |
| Salve a guilty conscience | 25 |
| Salve one's conscience | 26 |
| Expiate, with "for" | 29 |
| Words before time or another? | 29 |
| When the noon hour ends | 23 |
| When some people go to bed | 26 |
| When some people finish lunch | 29 |
| Supply satisfaction (for) | 25 |
| Say ten Hail Marys, say | 23 |
| Make good for past sins | 23 |
| When some people eat lunch | 26 |
| When most NFL games start | 25 |
| When many return from lunch | 27 |
| When many people have lunch | 27 |
| What some repenters do | 22 |
| Thing to do on Yom Kippur | 25 |
| Show one's sorry (for) | 26 |
| Set things straight, in a way | 29 |
| Say an Act of Contrition | 24 |
| Right one's wrongs | 22 |
| One way to deal with sin | 24 |
| Offset, with "for" | 28 |
| Observe Yom Kippur, in a way | 28 |
| Observe Yom Kippur, e.g. | 24 |
| Make reparations, e.g. | 22 |
| Make reparations (for) | 22 |
| Make it up to ousted member | 27 |
| In total agreement (with) | 25 |
| Evangelist's directive | 26 |
| Do community service, perhaps | 29 |