| Answer | Crossword Clue |
|---|---|
| GASSES | Helium and neon, for two |
| GASES | Argon and neon, for two |
| GASES | Neon and xenon, for two |
| GASSES | Neon and argon, for two (Var.) |
| GASES | Neon and helium |
| GASES | Helium and neon |
| GASSES | Helium and neon |
| INERT | Like neon and helium |
| INERT | Like helium and neon |
| RAMSAY | Discoverer of helium and neon |
| GASSES | Helium and neon, e.g. |
| RAREGASES | Helium and neon, e.g. |
| GASHOPPERS | Pogo sticks made of neon and helium? |
