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- ...ry]] performed studies finding [[xenon]] gas to be a suitable replacement. Xenon is now the preferred propellant for ion engines as it has a high molecular [[oc:Mercuri (element)]]69 KB (10,077 words) - 21:35, 20 September 2010
- ...ll elements to give chlorides. Compounds with [[oxygen]], [[nitrogen]], [[xenon]], and [[krypton]] are known, but do not form by direct reaction of the ele [[oc:Clòr]]36 KB (5,155 words) - 21:35, 20 September 2010
- {{Infobox xenon}} ...> Its [[atomic number]] is 54. A colorless, heavy, odorless [[noble gas]], xenon occurs in the [[Earth's atmosphere]] in trace amounts.<ref>{{cite web82 KB (11,842 words) - 21:02, 24 September 2010