Chemical element, chemical symbol Xe, atomic number 54.
One of the noble gases, it is colourless, odourless, tasteless, and nearly inert, combining only with fluorine and oxygen and in complexes (&see; bonding). Xenon occurs in slight traces in Earth's atmosphere and in rocks. Obtained by fractional distillation of liquefied air, it is used in luminescent tubes (&see; electric discharge lamp), flash lamps, lasers, and tracer studies and as an anesthetic.
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