Xenon
Xenon is an element, number 54 on the periodic table. At least one known lifeform was xenon-based. ()

In 2152, T'Pol noted the presence of trace amounts of xenon on the Wisp ship. ()

In 2367, Data suggested using xenon or some other inert gas to assist in removing a proximity detector in Ishara Yar. ()

See also
 Theta-xenon

External links
 
 

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Elements