Xenon
From Memory Alpha, the free Star Trek reference
| Name: | Xenon |
| Symbol: | Xe |
| Atomic Number: | 54 |
Xenon is an element, number 54 on the periodic table. (TNG: "Legacy")
Neelix once had his universal translator go offline while he held negotiations with a xenon-based lifeform. (VOY: "Hope and Fear")
