xenon: Quick Facts

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Nov. 8, 2026

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Xenon-based method measures key MRI contrast metal more sensitively than earlier techniques • Oct. 29, 2026, 3:00 AM ET (Medical Xpress)

Facts

Also Known As	Xe

Photos

A labeled diagram of the periodic table entry for xenon shows its atomic number 54, symbol Xe, atomic weight 131.293, electron configuration, and name. It is identified as a noble gas, with a face-centered cubic crystal structure, weakly acidic higher-valence oxides, and is a gas at 20 degrees Celsius.

Line graph showing the first ionization energies of the elements as a function of atomic number, with peaks at noble gases like helium, neon, argon, krypton, xenon, and radon, and labeled elements at key points.

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Topics

xenon-129 air chemical element noble gas hydrogen carbon sodium nitrogen sulfur phosphorus boron iodine fluorine zinc

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Key People

William Ramsay

Sir William Ramsay

British chemist

Periodic Table of the elements concept image (chemistry)

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Concept artwork on the periodic table of elements.

118 Names and Symbols of the Periodic Table Quiz