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  2. Krypton - Wikipedia

    en.wikipedia.org/wiki/Krypton

    Krypton, like the other noble gases, is used in lighting and photography. Krypton light has many spectral lines, and krypton plasma is useful in bright, high-powered gas lasers (krypton ion and excimer lasers), each of which resonates and amplifies a single spectral line. Krypton fluoride also makes a useful laser medium.

  3. Krypton (comics) - Wikipedia

    en.wikipedia.org/wiki/Krypton_(comics)

    Krypton is usually portrayed in comics as the home of a fantastically advanced civilization, which is destroyed when the planet explodes. As originally depicted, all the civilizations and races of Krypton perished in the explosion, with one exception: the baby Kal-El who was placed in an escape rocket by his father, Jor-El, and sent to the planet Earth, where he grew up to become Superman.

  4. Noble gas compound - Wikipedia

    en.wikipedia.org/wiki/Noble_gas_compound

    Krypton octahedra (green) are surrounded by randomly oriented hydrogen molecules. [ 29 ] Prior to 1962, the only isolated compounds of noble gases were clathrates (including clathrate hydrates ); other compounds such as coordination compounds were observed only by spectroscopic means. [ 4 ]

  5. Kryptonite - Wikipedia

    en.wikipedia.org/wiki/Kryptonite

    Kryptonite is a fictional material that appears primarily in Superman stories published by DC Comics.In its best-known form, it is a green, crystalline material originating from Superman's home world of Krypton that emits a unique, poisonous radiation that can weaken and even kill Kryptonians.

  6. Kryptonian - Wikipedia

    en.wikipedia.org/wiki/Kryptonian

    Kal-El can lead an alter ego as Clark Kent because Kryptonians appear identical to humans. Also, in both Silver Age and Modern Age continuity, Kryptonians have more than one ethnic group, such as dark-skinned Kryptonians from Krypton's Vathlo Island that resemble Earth humans of Sub-Saharan African, Negrito, Melanesian, and Indigenous Australian descent and a group from the continent of Twenx ...

  7. Noble gas - Wikipedia

    en.wikipedia.org/wiki/Noble_gas

    For instance, argon, krypton, and xenon form clathrates with hydroquinone, but helium and neon do not because they are too small or insufficiently polarizable to be retained. [61] Neon, argon, krypton, and xenon also form clathrate hydrates, where the noble gas is trapped in ice. [62] An endohedral fullerene compound containing a noble gas atom

  8. Xenon - Wikipedia

    en.wikipedia.org/wiki/Xenon

    Xenon was discovered in England by the Scottish chemist William Ramsay and English chemist Morris Travers on July 12, 1898, [30] shortly after their discovery of the elements krypton and neon. They found xenon in the residue left over from evaporating components of liquid air.

  9. Isotopes of krypton - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_krypton

    Krypton-81 is useful in determining how old the water beneath the ground is. [10] Radioactive krypton-81 is the product of spallation reactions with cosmic rays striking gases present in the Earth atmosphere, along with the six stable or nearly stable krypton isotopes. [11] Krypton-81 has a half-life of about 229,000 years.