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Author: langbot
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English[en]
Xenon is a chemical element with the symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas found in Earth's atmosphere in trace amounts.[11] Although generally unreactive, it can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.[12][13][14] Xenon is used in flash lamps[15] and arc lamps,[16] and as a general anesthetic.[17] The first excimer laser design used a xenon dimer molecule (Xe2) as the lasing medium,[18] and the earliest laser designs used xenon flash lamps as pumps.[19] Xenon is also used to search for hypothetical weakly interacting massive particles[20] and as a propellant for ion thrusters in spacecraft.[21] Naturally occurring xenon consists of seven stable isotopes and two long-lived radioactive isotopes. More than 40 unstable xenon isotopes undergo radioactive decay, and the isotope ratios of xenon are an important tool for studying the early history of the Solar System.[22] Radioactive xenon-135 is produced by beta decay from iodine-135 (a product of nuclear fission), and is the most significant (and unwanted) neutron absorber in nuclear reactors.[23]
Cornish[kw]
Elven gymyk yw ksenon, niver 54 y'n Vosen Beriodek. Y furvell gymyk yw Xe. An hanow a dheu dhyworth an ger Greka ξένον xénon, ow styrya estrenyon. Nyns eus rann vewoniethel dhe'n elven ma. Diskudhys veu yn 1898 gans William Ramsay ha Morris William Travers yn Kolji Pennskol Loundres. I re dhiskudhsa neon, argon ha krypton seulabrys. I a usyas jynn ayr-lin dhe denna krypton dhyworth ayr, ha distyllyans rannrivek (fractional distillation) dhe enyshe ksenon dhyworto. Henwys veu ksenon gansa drefen y vos kales dhe dhiskudha. Kevys yw ksenon yn dowr ewonek Vichy. Askorrys yw le es unn tonnas a gsenon pub bledhen dhyworth gweythvaow ayr-lin. Usys yw yn lugern lughes, laserow, hag arhwilellow PET. Anella kemyskans a oksyjen ha ksenon a wra gweres askorrans erythropoietin, hormon hag a ynkress askorrans kellow goos rudh. Usys yw ksenon ytho gans sportysi neb a vynn tolla. Emskemunys yw gans WADA, maynorieth ollvysel gorth-dopya. Poos atomek ksenon yw 131.29, y boynt teudhi yw -112°C ha'y boynt bryjyon yw -107°C. Y dhosedh yw 5.9 gramm pub liter. Gass diliw, anvlasus yw. Onan a'n gassys nobyl yw. Usys yw ksenon y'n efanvos drefen y vos an keunys gwella rag jynnow ion.