| Clue | Source | Date |
|---|---|---|
| Figure indicating the quantity of protons in a nucleus (6,6) | ||
| A male in charge, having less feeling as a scientific figure | The Times Quick Cryptic | 17 Oct 2024 |
| 2, for helium | Premier Sunday | 16 Feb 2020 |
| Unique identifier using the five vowels | ||
| Physicist's theme song? | ||
| With 102-Across, element that makes up this puzzle's theme | ||
| Scientist's concern. |