| Answer | Crossword Clue |
|---|---|
| XENON | Gaseous element used in lasers |
| ARGON | Gaseous element in our atmosphere |
| XENON | Gaseous element in our atmosphere |
| ARGON | Gaseous element in the air. |
| XENON | Gas used in lasers |
| NEON | Gas used in lasers |
| YTTRIA | Powder used in lasers |
| ARGONS | Some lasers used in laser shows |
