| Themes > Science > Chemistry > General Chemistry > Elements > More Information about Noble Gases > More Information about Noble Gases > Krypton |
Named from the Greek kryptos or "hidden", krypton is neither green nor a solid material that can defeat Superman. Rather it is another noble gas discovered in 1898 by Ramsay and Travers. It ranks sixth in abundance in the atmosphere. Krypton gas is used in various kinds of lights, from small bright flashlight bulbs to special strobe lights for airport runways. As with the other noble gases, krypton is isolated from the air by liquefaction. One of the naturally occurring non-radioactive isotopes of krypton, Kr-86 (17.3%) is used as the basis for the current international definition of the meter. One meter is 1,650,762.73 wavelengths of the red-orange spectral line of krypton-86. |
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