54 Xe Xenon
Noble gas, mass: 131.29 u, 9 stable isotopes (124, 126, 128, 129, 130, 131, 132, 134, 136), abundance rank (earth/space): 83/40Click image to magnify. Vial of glowing ultrapure xenon. Original size in cm: 1 x 5. How to make gases glow.
Xenon is the most heavy and reactive noble gas (except for the radioactive radon) and is the rarest non-radioactive element on earth. Therefore it is very expensive. It is primarly used in lamps, like in automobile headlights. Several xenon compounds are known, some of them are even quite stable. The compound first to be discovered was xenon tetrafluoride, XeF4, in 1962.
Right: The first xenon tetrafluoride crystals. Photo: public domain.
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Page last changed on March 05. 2016
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