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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

    The people of Argo (which is often portrayed as a city on Krypton itself that is protected from destruction by a forcefield but in some continuities is a Kryptonian colony on a moon or neighboring planet) also survive Krypton's destruction due to an energy field surrounding the city, although in most universes they either die out soon afterward ...

  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.