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Topic: Dubnium

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	Dubnium (Db) - Chemical properties, Health and Environmental effects
		The atomic weight of nine known isotopes range from 255 to 263; the longest-lived isotope, dubnium 268 has an half-life of 32 hours.
		Dubnium does not have any application and little is known about it.
		Dubnium is not found free in the environment, it is a synthetic element.
	www.lenntech.com /Periodic-chart-elements/Db-en.htm (145 words)

	Amazon.com: dubnium (Site not responding. Last check: 2007-10-07)
		Uuo Francium Radium Actinium Ruthatrdiu Dubnium Seabor iu Bohrium Hassium Meitiherium...
		Uuo Francium Radium Actinium Rutherbrdiu Dubnium Seabor ium Bohrium Hassium Meitnerium...
		96 (247) 13.5 (calc.) 1345 Dubnium Db 105 (262) - -...
	www.amazon.com /s?ie=UTF8&keywords=dubnium&tag=lexico&index=blended&link_code=qs&page=1 (1141 words)

	NationMaster - Encyclopedia: Dubnium (Site not responding. Last check: 2007-10-07)
		Dubnium (formerly also called Eka-Tantalum, Hahnium and Unnilpentium) is a chemical element in the periodic table that has the symbol Db and atomic number 105.
		In 1997 the name dubnium was accepted internationally for element 105, in recognition of the pioneering work done at the Dubna laboratory.
		Dubnium is a chemical element in the periodic table that has the symbol Db and atomic number 105.
	www.nationmaster.com /encyclopedia/Dubnium (1996 words)

	Dubnium
		Dubnium is a chemical element in the periodic table that has the symbol Db and atomic number 105.
		This is a highly radioactive synthetic element whose most stable isotope has a half life of less than 40 seconds.
		Dubnium (named after Dubna[?], Russia) was reportly first synthesized in early 1970 by Albert Ghiorso in Dubna, Russia.
	www.ebroadcast.com.au /lookup/encyclopedia/du/Dubnium.html (253 words)

	dubnium - Encyclopedia.com
		The syntheses of at least nine isotopes of dubnium, with half-lives ranging from 1.2 sec (Db-259) to 34 sec (Db-262), have been confirmed.
		In 1994 a committee of the International Union of Pure and Applied Chemistry (IUPAC), convened to resolve naming disputes for the transactinide elements, recommended that element 105 be named joliotium, symbol Jl, after the French physicist Frédéric Joliot-Curie.
		In 1997 the name dubnium was accepted internationally for element 105, in recognition of the pioneering work done at the Dubna laboratory.
	www.encyclopedia.com /doc/1E1-dubnium.html (613 words)

	Facts about Dubnium
		Dubnium is classified as a "Transition Metal" which are located in Groups 3 - 12 of the Periodic Table.
		Dubnium was first synthesized at the Joint Nuclear Research Institute at Dubna, in Russia, in 1964 - leading to the name Dubnium.
		Find out more facts about Dubnium on the Periodic Table which arranges every chemical element according to its atomic number, as based on the periodic law, so that chemical elements with similar properties are in the same column.
	www.facts-about.org.uk /science-element-dubnium.htm (495 words)

	Dubnium
		Dubnium was created by smashing two other particles, Californium and Nitrogen, together in a
		Scientists have no yet been able to posess pure Dubnium; it always has a couple impurities, so scientists have never been able to run tests on pure Dubnium.
		Dubnium used to be called Hahnium (Ha), but the name was changed by a comittee of scientists in 1970.
	www.mvschools.org /ms/projects/html/blue/dubnium.htm (207 words)

	Dubnium (Site not responding. Last check: 2007-10-07)
		Dubnium is number 105 in the periodic table.
		Dubnium has a unknown melting point and boiling point.
		Dubnium was discovered in 1970 by Albert Ghiorso.
	home.earthlink.net /~danieldorsey/periodictable04/105.htm (103 words)

	Dubnium - Wikipedia, the free encyclopedia
		Dubnium (IPA: /ˈduːbniəm/), also called eka-tantalum, is a chemical element in the periodic table that has the symbol Db and atomic number 105.
		This relatively high stability compared to the surrounding elements on the periodic table gives evidence that by manipulating the number of neutrons in a nucleus, one can alter the stabilities of such nuclei.
		Dubnium (named after Dubna, Russia) was reportedly first synthesized in 1967 at the Joint Institute for Nuclear Research in Dubna, Russia (reportedly producing nuclide
	en.wikipedia.org /wiki/Dubnium (345 words)

	Dubnium (Site not responding. Last check: 2007-10-07)
		presumably a solid Dubnium (formerly also called Eka-Tantalum, Hahnium and Unnilpentium) is a chemical element in the periodic table that has the symbol Db and atomic number 105.
		This is a highly radioactive synthetic element whose most stable isotope has a half life of 16 hours (dubnium-268).
		Dubnium (named after Dubna, Russia) was reportedly first synthesized in 1967 at the Joint Institute for Nuclear Research in Dubna, Russia (reportedly producing element 105-260 and element 105-261 by bombarding americium-243 with neon-22).
	dubnium.iqnaut.net (367 words)

	105 (Site not responding. Last check: 2007-10-07)
		Dubnium is an element found in group 5 and period 7 on the Periodic
		Dubnium is a man made element and so it has no use of any kind and cannot be found anywhere in our environment today.
		Although in an encyclopedia that I found state that Dubnium was also found in the Univ. of California at Berkeley by Albert Ghiorso.
	homepage.mac.com /mrlaurie/btcfolder/elements/105.html (155 words)

	Dubnium - Periodic Table of the Elements
		Dubnium was discovered by workers at the Nuclear Institute at Dubna (USSR) and by workers at the University of California, Berkeley (USA) in 1967.
		The origin of the name dubnium is the Joint Nuclear Institute at Dubna, Russia, an institute heavily involved in the search for heavy elements.
		Dubnium was made by bombarding californium-249 with a beam of nitrogen-15 ions.
	www.ktf-split.hr /periodni/en/db.html (102 words)

	A Periodic Table of the Elements From Mineral Information Institute (Site not responding. Last check: 2007-10-07)
		Its chemistry and appearance are not known with any certainty, although the chemistry is believed to be similar to tantalum.
		Dubnium is too rare to have any commercial or industrial application.
		Obtained from: Dubnium is obtained by the particle bombardment of californium or berkelium.
	www.mii.org /periodic/Db.htm (153 words)

	The Element Dubnium
		Dubnium - An element from the Periodic Table based on the IOUPAC 1985 standard
		Check out Dubnium on the Periodic Table which arranges each chemical element according to its atomic number, as based on the periodic law, so that chemical elements with similar properties are in the same column.
		Our Periodic Table is simple to use - just click on the symbol for Dubnium for additional information and for an instant comparison of the Atomic Weight, Melting Point, Boiling Point and Mass - G/cc with any other element.
	www.periodic-table.org.uk /element-dubnium.htm (361 words)

	Dubnium (Db) (Site not responding. Last check: 2007-10-07)
		Dubnium is a man-made metal element believed to be silvery white or gray colored.
		In 1967, dubnium was reported by Flerov at the Joint Research Institute in Russia, who discovered it through experiments involving reactions between americium ions with neon ions.
		In 1970, Albert Ghiorso and others announced their creation of dubnium at the University of California at Berkeley, U.S. This method involved reactions between californium isotopes with a nitrogen ion.
	www.bayerus.com /msms/fun/pages/periodic/dubnium (112 words)

	The Open Door Web Site : Visual Chemistry : Dubnium
		Dubnium is a radio active atom that was obtained by nuclear fusion techniques.
		In 1997 the IUPAC settled the question by naming it dubnium, after the town near Moscow where the Joint Institute for Nuclear Research is situated.
		Dubnium atoms have a half life of 34 seconds.
	www.saburchill.com /chemistry/visual/atoms/105.html (157 words)

	Dubnium - Search Results - ninemsn Encarta
		Dubnium, symbol Db, chemical element with atomic number 105, produced artificially by nuclear fusion (in which an element with larger atoms is...
		Element 105 (named dubnium in 1997) was produced at Dubna in 1968 by bombarding americium with neon ions; Ghiorso’s team achieved a similar result in...
		Help with Spanish, French, German, and Italian homework.
	au.encarta.msn.com /Dubnium.html (64 words)

	It's Elemental - The Element Dubnium
		In 1970, a group of scientists working at the Lawrence Radiation Laboratory, now known as the Lawrence Berkeley Laboratory, in Berkeley, California, bombarded atoms of californium-249 with ions of nitrogen-15, forming atoms of dubnium-260 and 4 free neutrons.
		Dubnium's most stable isotope, dubnium-268, has a half-life of about 16 hours.
		Due to the small amounts produced and its short half-life, there are currently no uses for dubnium outside of basic scientific research.
	education.jlab.org /itselemental/ele105.html (155 words)

	Dubnium
		Information resources on Dubnium and the chemistry and physics of Dubnium.
		In 1997 the IUPAC settled on the name Dubnium.
		rutherfordium (Rf), dubnium (Db) and Seaborgium (Sg) are found to be similar to their homologs in the periodic table in group IV, V and VI respectively.
	www.chemlin.net /chemical-elements/dubnium.htm (494 words)

	Periodic Table of the Elements - National Research Council Canada
		The discovery of dubnium (element 105) in 1970 is credited to scientists both in Russia and the United States.
		However, dubnium was named after the small town of Dubna in Russia.
		Only a few atoms of highly radioactive dubnium have ever been isolated, as it does not occur naturally on Earth.
	www.nrc-cnrc.gc.ca /education/elements/el/db_e.html (110 words)

	105 Dubnium
		In 1994 IUPAC proposed the name Joliotium (Jl) for element #105 "to recognize the French scientist F. Joliot-Curie who contributed greatly to the development of nuclear physics and chemistry, and who shared the Nobel prize in 1935 with Mme.
		Curie", and for element #104 Dubnium "to recognize the distinguished contributions to chemistry and modern nuclear physics of the international scientific centre at Dubna near Moscow." The American Chemical Society kept the name Hahnium (Ha), as proposed by Ghiorso and co-workers.
		In 1997, at the final elements christening during the International Union of Pure and Applied Chemistry (IUPAC) Council meeting in Geneva, element #104 was named Rutherfordium and element #105 got the name and symbol Dubnium (Db) (see "Naming the transfermium elements" on the Mendelevium page).
	www.vanderkrogt.net /elements/elem/db.html (428 words)

	Chemistry : Periodic Table : dubnium : key information
		Dubnium is a synthetic element that is not present in the environment at all.
		Here is a brief summary of the isolation of dubnium.
		Only very small amounts of of element 105, dubnium, have ever been made.
	www.webelements.com /webelements/elements/text/Db/key.html (151 words)

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