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xenon
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xenon
xenon

xenon

chemical element
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Articles from Britannica Encyclopedias for elementary and high school students.
Also known as: Xe
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
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Last Updated: • Article History
Key People:
Sir William Ramsay
Related Topics:
chemical element
noble gas
air
xenon-129

xenon (Xe), chemical element, a heavy and extremely rare gas of Group 18 (noble gases) of the periodic table. It was the first noble gas found to form true chemical compounds. More than 4.5 times heavier than air, xenon is colorless, odorless, and tasteless. Solid xenon belongs to the face-centered cubic crystal system, which implies that its molecules, which consist of single atoms, behave as spheres packed together as closely as possible. The name xenon is derived from the Greek word xenos, “strange” or “foreign.” atomic number 54 atomic weight 131.29 melting point −111.9 °C (−169.4 °F) boiling point −108.0 ...(100 of 1576 words)

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