| Clue | Source | Date |
|---|---|---|
| Rightmost column on the periodic table | Wall Street Journal | 10 Jun 2026 |
| Xenon and krypton, e.g. | New York Times | 29 Mar 2026 |
| Another name for inert or noble elements such as Argon: 2 wds | ||
| Krypton and others | ||
| Contents of the rightmost column of a table | ||
| Helium and neon, e.g. | ||
| They don't react much | ||
| Krypton and xenon | ||
| Krypton, xenon, etc. | ||
| Krypton and others |