| Answer | Crossword Clue |
|---|---|
| GASES | Krypton and xenon |
| ELEMENTS | Krypton and xenon |
| GASES | Xenon and krypton |
| RAREGASES | Krypton and xenon |
| INERT | Like krypton and xenon |
| INERT | Like xenon and krypton |
| GASES | Krypton and xenon, e.g. |
| GASES | Xenon and krypton, for two |
| RAREGASES | Krypton, xenon, etc. |
| RAREGAS | Xenon or krypton |
| INERTGAS | Krypton or xenon |
| INERT | Like krypton or xenon |
