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Topic: Krypton


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In the News (Tue 16 Jul 19)

  
  Chemistry : Periodic Table : krypton : key information
Krypton is present in the air at about 1 ppm.
Solid krypton is a white crystalline substance with a face-centered cubic structure which is common to all the "rare gases".
Krypton is present to a small extent (about 1 ppm by volume) in the atmosphere and is obtained as a byproduct from the liquefaction and separation of air.
www.webelements.com /webelements/elements/text/Kr/key.html   (253 words)

  
  It's Elemental - The Element Krypton
Krypton is used in some types of photographic flashes used in high speed photography.
Krypton gas is also combined with other gases to make luminous signs that glow with a greenish-yellow light.
In 1960, the length of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.
education.jlab.org /itselemental/ele036.html   (179 words)

  
  Krypton   (Site not responding. Last check: )
Krypton was a planet of giant size located somewhere in the outer reaches of trackless space.
Krypton was a planet of staggering richness and incomporable natural beauty.
Astronomy on Krypton was highly advanced, enabling Kryptonian scientists to study Earth and presumably other planets with excruciating clarity by means of super-powerful telescopes, even to the extent of being able to tune in on selected alien individuals and monitor and translate their private conversations.
theages.superman.ws /Encyclopaedia/krypton.php   (3136 words)

  
  Krypton - Wikipedia, the free encyclopedia
Krypton can also form clathrates with water when atoms of it are trapped in a lattice of the water molecules.
Krypton, a so-called noble gas due to its very low chemical reactivity, is characterized by a brilliant green and orange spectral signature.
Solidified krypton is white and crystalline with a face-centered cubic crystal structure which is a common property of all "rare gases".
en.wikipedia.org /wiki/Krypton   (681 words)

  
 Krypton (comics) - Wikipedia, the free encyclopedia
In its first appearance, Krypton was only depicted at the moment of its destruction, the nature of life on Krypton being unaddressed and frankly irrelevant to Superman's adventures on contemporary Earth; the plain fact of his extraterrestrial origin was considered sufficient enough to explain his superpowered status.
Soon, beginning in the Superman comic strip, Krypton was shown to have been an evolved version of Earth, older by eons and possessed of all the beneficial progress that implied (though the downside was the hint that Krypton exploded due mainly to old age).
The Silver Age Superman was not alone in the survival of Krypton's destruction, being joined by his cousin Supergirl, the Phantom Zone criminals, Beppo the super-monkey, Krypto the superdog, a juvenile delinquent named Dev-Em and the entire population of the city of Kandor.
en.wikipedia.org /wiki/Krypton_(planet)   (2840 words)

  
 Krypton - Wikipedia
Krypton is een scheikundig element met symbool Kr en atoomnummer 36.
Krypton is een edelgas dat bekend staat om de scherpe groene en oranjerode lijnen in het spectrum.
Hoewel krypton een edelgas is, lijkt het erop dat er toch verbindingen mogelijk zijn.
nl.wikipedia.org /wiki/Krypton   (307 words)

  
 MSN Encarta - Krypton
Krypton was first isolated in 1898 by the British chemists Sir William Ramsay and Morris William Travers by fractional distillation of a mixture of the noble gases.
Krypton is present in the atmosphere to the extent of 1 part per million.
Krypton is used alone or with argon and neon in incandescent bulbs.
encarta.msn.com /encyclopedia_761564844/Krypton.html   (235 words)

  
 Krypton (Kr) - Chemical properties, Health and Environmental effects
Krypton is used to fill electric lamp bulbs which are filled with a mixture of krypton and argon, and for various electronic devices.
Krypton is also used in photographic projection lamps, in very high-powered electric arc lights used at airports and in some strobo-lamps, because it has an extremely fast respons to an electric current.
Krypton is a rare atmospheric gas and as such is non-toxic and chemically inert.
www.lenntech.com /Periodic-chart-elements/Kr-en.htm   (653 words)

  
 Krypton   (Site not responding. Last check: )
Krypton a so-called noble gas due to very low chemical reactivity is characterized by brilliant green and orange spectral signature.
The SI standard definition of the length of metre was from 1960 to 1983 based the light emitted by excited krypton atoms: the metre was defined as 1 650 wavelengths of the orange-red emission line emitted by krypton-86 atoms.
Krypton di fluoride has been made in gram quantities and can be produced in different ways.
www.freeglossary.com /Kr   (724 words)

  
 krypton. The Columbia Encyclopedia, Sixth Edition. 2001-05
Krypton is also used in tungsten-filament photographic projection lamps and in very high-powered electric arc lights used at airports.
A mixture of stable and unstable isotopes of krypton is produced by slow neutron fission of uranium in nuclear reactors.
Krypton was discovered in 1898 by William Ramsay and W. Travers in residue from the evaporation of a sample of liquid air from which oxygen and nitrogen had been removed.
www.bartleby.com /65/kr/krypton.html   (346 words)

  
 Universal Industrial Gases, Inc...Rare Gases - Neon, Krypton, Xenon Properties, Uses, Applications
Krypton and Xenon are about two to three times as heavy as argon (molecular weight 39.95) and approximately three to four times as heavy as nitrogen (molecular weight 28.0) which is used as in inert gas in many applications, but is not a true inert gas.
Krypton is used in halogen sealed beam headlights to increase light output by allowing thinner filaments to be used with acceptable useful lifetimes.
Krypton is also used in in lasers, in particular mixed with fluorine to create an "excimer" mixture that is a precursor to a molecule which exists in the excited state but not in the ground state.
www.uigi.com /rare_gases.html   (966 words)

  
 Krypton - Kr - Purity, properties and packaging - Krypton has some use in the lighting and electronic industry. A ...
Krypton is named from the Greek word kryptos, "hidden." Traces of krypton are present in minerals and meteorites, but the usual commercial source is the atmosphere, which contains 1.14 parts per 106 by volume.
Krypton also is formed by the nuclear fission of uranium triggered by slow neutrons: this source may be expected to become increasingly important because of the growing number of fission-power plants.
Krypton is used in certain fluorescent lamps and in a flash lamp employed in high-speed photography.
www.c-f-c.com /specgas_products/krypton.htm   (503 words)

  
 Krypton - Supermanica   (Site not responding. Last check: )
Krypton had a massive uranium core (S No.53/1) and was occasionally swept by windstorms so violent that the planet's tallest skyscrapers had to be lowered into the ground to prevent their being toppled by the powerful gales (S No.123, Aug 1958: "The Girl of Steel"; and others).
The capital of Krypton was the city of Kandor.
Several years before Krypton exploded, however, Kandor was reduced to microscopic size and stolen by the space villain Brainiac, and a new world capital was established in the city of Kryptonopolis, the city which would later become Superman's birthplace.
supermanica.info /wiki/index.php/Krypton   (2208 words)

  
 Krypton   (Site not responding. Last check: )
Krypton was discovered by Ramsey and Travers in the final residues from the evaporation of liquidified air.
Krypton is present in the atmosphere in trace amounts (approximately 1 ppm).
Krypton is extracted from the final residues of liquefied air by fractional distillation, from which the major components (i.e.
www.ucc.ie /ucc/depts/chem/dolchem/html/elem/elem036.html   (86 words)

  
 Wikinfo | Krypton   (Site not responding. Last check: )
The international definition of the length of the meter was, from 1960 to 1983, based on the light emitted by excited krypton atoms as a standard: specifically, the meter was defined as 1,650,763.73 wavelengths of the orange-red emission line emitted by krypton-86 atoms.
This agreement replaced the longstanding standard meter located in Paris which was a metal bar made of a platinum-iridium alloy (the bar was originally estimated to be one ten millionth of a quadrant of the earth's polar circumference).
In October 1983 the krypton standard was in turn replaced by the International Bureau of Weights and Measures.
www.wikinfo.org /wiki.php?title=Krypton   (660 words)

  
 Krypton   (Site not responding. Last check: )
Krypton is a dense, colorless, odorless atmospheric gas.
The radioactive isotopes of krypton are produced artificially as byproducts of nuclear power plants.
The meter was once defined in terms of the vacuum wavelength of the radiation corresponding to the transition between two atomic levels of the krypton isotope.
nobel.scas.bcit.ca /resource/ptable/kr.htm   (337 words)

  
 Krypton - Kr - Purity, properties and packaging - Krypton has some use in the lighting and electronic industry. A ...
A radioactive isotope of krypton, Kr85, is widely used in the medical field in heart shunt studies, and as atriggering agent in discharge type electronic tubes.
Krypton is used in certain fluorescent lamps and in a flash lamp employed in high-speed photo-graphy.
The wavelength of an orange-red component of light emitted by stable krypton-86, because of its extreme sharpness, served as the international standard for the metre from 1960 to 1983.
www.c-f-c.com /gaslink/pure/krypton.htm   (503 words)

  
 Krypton
Krypton is on the periodic table in the 8 th group.
Krypton is used in certain lamps for high speed flash photograph, an lighting.
Krypton was discovered in 1898 by Sir William Ramsay and Morris W. Travers in Great Britian.
www.gfsnet.org /msweb/itselementary05/pages/krypton2.html   (164 words)

  
 Krypton Applications
Depending upon the application, argon is sometimes mixed with the krypton, and there are special systems that also require about 10 percent oxygen be added to the krypton.
Krypton is always mixed with a halogen, typically fluorine, to produce the desired characteristics.
Krypton is sometimes used within halogen sealed beam headlights, which produce up to double the light output of standard incandescent headlamps.
www.praxair.com /praxair.nsf/AllContent/C98AE71047137106052565660054433C?OpenDocument&URLMenuBranch=C02384720F10F9958525706F0028BC9A   (0 words)

  
 Krypton Associates - Phone Sex Operator Job Listings
Krypton Associates - Phone Sex Operator Job Listings
Welcome to Krypton Associates jobs, hiring and training site for phone sex operators and job seekers interested in employment in the online adult phone sex service industry.
© 2001-2006 Krypton Associates, Inc.is protected under copyright and trademark laws.
www.kryptonassociates.com   (134 words)

  
 What does the element krypton look like?
Krypton is one of the gases that makes up the earth's atmosphere.
Krypton is a colorless, odorless gas that rarely reacts with other elements.
When this is done, krypton lights up in much the same way a fluorescent light bulb does and glows with a smokey-white light.
education.jlab.org /qa/krypton.html   (0 words)

  
 The Hendrix Group - Krypton
While krypton is generally thought of as a rare gas that normally does not combine with other elements to form compounds, it now appears that the existence of some krypton compounds is established.
Krypton difluoride has been prepared in gram quantities and can be made by several methods.
The activity of these kryptonates is sensitive to chemical reactions at the surface.
www.hghouston.com /elements/36.html   (383 words)

  
 Krypton
In 1960 it was internationally agreed that the fundamental unit of length, the meter, should be defined in terms of the orange-red spectral line of 86Kr.
In October 1983 the meter, which originally was defined as being one ten millionth of a quadrant of the earth's polar circumference, was again redefined by the International Bureau of Weights and Measures as being the length of a path traveled by light in a vacuum during a time interval of 1/299,792,458 of a second.
Krypton is used in certain photographic flash lamps for high-speed photography.
www.corrosionsource.com /handbook/periodic/36.htm   (354 words)

  
 KRYPTON   (Site not responding. Last check: )
Weitere Bedeutung: In den Superman-Comics ist Krypton der Heimatplanet von Superman.
Krypton ist im gasförmigen und flüssigen Zustand farblos, im festen Zustand weiß und kristallin.
Krypton (griechisch krypton für versteckt) wurde 1898 durch William Ramsay und Morris William Travers im "Rückstand" verdampfter Luft entdeckt.
www.toonorama.com /encyclopedia/K/Krypton   (203 words)

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