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Topic: Actinide series

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	Actinide - Wikipedia, the free encyclopedia
		The actinide series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table with atomic numbers 89 - 103.
		The actinides display less similarity in their chemical properties than the lanthanide series, for instance exhibiting a wider range of oxidation states, which initially led to confusion as to whether actinium, thorium and uranium should be considered d-block elements.
		An Organometallic compound of an actinide is known as an organoactinide.
	en.wikipedia.org /wiki/Actinide_series (420 words)

	Actinide - Biocrawler (Site not responding. Last check: 2007-10-31)
		The actinide series encompasses the 14 chemical elements that lie between thorium and lawrencium on the periodic table with atomic numbers 90 - 103 inclusive.
		The actinide series is named after actinium, and this element is often included in the series by convention.
		Actinides have chemically similar characteristics to the elements of the lanthanide series, and to scandium and yttrium, but actinides are all radioactive.
	www.biocrawler.com /encyclopedia/Actinide (245 words)

	actinide series - HighBeam Encyclopedia
		ACTINIDE SERIES [actinide series] a series of radioactive metallic elements in Group 3 of the periodic table.
		It is known, however, that all members of the series resemble actinium and each other in their chemical properties and that they have a strong chemical resemblance to their homologs in the lanthanide series.
		Elements with atomic numbers greater than 103 are not members of the actinide series; element 104 (rutherfordium) is the first of the transactinide elements.
	www.encyclopedia.com /doc/1E1-actinide.html (322 words)

	Highbeam Encyclopedia - Search Results for actinide
		actinide series ACTINIDE SERIES [actinide series] a series of radioactive metallic elements in Group 3 of the periodic table.
		It is a metal of the actinide series in Group 3 of the periodic table.
		Mendelevium is a metal of the actinide series in Group 3 of the periodic table.
	www.encyclopedia.com /SearchResults.aspx?Q=actinide (428 words)

	Class 205: ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS / U.S. Patent ...
		Subject matter wherein the actinide series element is plutonium or a compound thereof.
		Subject matter wherein the actinide series element is thorium or a compound thereof.
		Subject matter wherein the actinide series element is uranium or a compound thereof.
	www.uspto.gov /web/offices/ac/ido/oeip/taf/def/205.htm (8244 words)

	Density Functional Calculations on Actinide Compounds
		Water is an ubiquitous solvent for actinides in the environment, in storage tanks, or in repositories.
		The trend along the actinide series (decrease of the stretching frequencies, Figure 3) has been related to the decrease in size of the 5f orbitals as the atomic number increases.
		The actinide block, the lowest part of the periodic table, stands out among the elements: It is practically only here that f-orbitals participate in chemical bonding.
	home.cc.umanitoba.ca /~schrecke/research_DIR/CCP1_actinides.html (2574 words)

	Actinide Series - Search Results - MSN Encarta
		Actinide Series, a series of 14 radioactive elements in the periodic table with atomic numbers 89 to 102.
		Only the first four elements in the series...
		Plutonium, symbol Pu, radioactive metallic element that is used in nuclear reactors and nuclear weapons.
	uk.encarta.msn.com /Actinide_Series.html (107 words)

	Chemical Elements.com - Rare Earth Elements
		The thirty rare earth elements are composed of the lanthanide and actinide series.
		One element of the lanthanide series and most of the elements in the actinide series are called trans-uranium, which means synthetic or man-made.
		All of the rare earth metals are found in group 3 of the periodic table, and the 6th and 7th periods.
	www.chemicalelements.com /groups/rareearth.html (82 words)

	Actinium Series: Free Encyclopedia Articles at Questia.com Online Library (Site not responding. Last check: 2007-10-31)
		The symbol for actinium emanation, or actinon...substance, the acid belongs to the series of olefine-monocarboxylic...
		Its chemical properties...similar to those of lanthanum and of members of the actinide series, of which it is usually considered the first member.
		...also called actinouranium, is the parent substance of the so-called actinium series, a 15-member radioactive decay series ending in stable lead-207; protactinium-231 and actinium-227 are the relatively stable members of this series.
	www.questia.com /library/encyclopedia/actinium-series.jsp?l=A&p=1 (680 words)

	actinide series
		actinide series, a series of radioactive metallic elements in group IIIb of the
		Members of the series are often called actinides, although
		It is known, however, that all members of the series resemble actinium and each other in their chemical properties and that they have a strong chemical resemblance to their homologs in the
	www.factmonster.com /ce6/sci/A0802378.html (309 words)

	Chem4Kids.com: Elements & Periodic Table: Actinide Series
		The Lanthanide series can be found naturally on Earth.
		Only one element in the series is radioactive.
		They are all radioactive and some are not found in nature.
	www.chem4kids.com /files/elem_actinide.html (167 words)

	The Actinide Research Quarterly: 1st Quarter 2004
		The calculated bond length between the actinide and the equatorial oxygen atoms (2.52 Å) is somewhat longer than observed by XAFS (2.42 Å).
		Among the novel features of actinide chemistry is the ability of these complexes to involve both 5f and 6d orbitals in forming chemical bonds.
		In the actinide series, proceeding across the periodic table entails formally filling up the 5f shell.
	www.lanl.gov /orgs/nmt/nmtdo/AQarchive/04spring/exploring.html (1644 words)

	End Of The Periodic Table
		Such a series, which would be listed in a row below the actinide series in the periodic table, should consist of 32 elements, ending in the neighbourhood of element 153 and resulting primarily from the filling of the 5g and 6f inner electron shells.
		"Not every element of this new series would correspond to an actinide (or lanthanide) element on a one-to-one basis, and prediction of the chemistry of the members of the series is a complex problem.
		The difficulty arises partly because of uncertainty of the exact point at which the energetically similar 5g and 6f orbitals begin to fill and partly because calculations indicate that the 8p and 7d orbitals may be very close in energy to the 5g and 6f orbitals.
	www.geocities.com /rihanij/classicblue.html (1206 words)

	AllRefer.com - actinide series, Compound & Element (Compounds And Elements) - Encyclopedia
		AllRefer.com - actinide series, Compound & Element (Compounds And Elements) - Encyclopedia
		actinide series, a series of radioactive metallic elements in group IIIb of the periodic table.
		See A. Freeman and G. Lander, ed., Handbook on the Physics and Chemistry of the Actinides (1984); S. Cotton, Lanthanides and Actinides (1991).
	reference.allrefer.com /encyclopedia/A/actinide.html (386 words)

	Education World® - Science : Chemistry : Periodic Table of Elements : Actinide Series Elements (Site not responding. Last check: 2007-10-31)*
		Actinide Series MSN Encarta Read the brief description about the group of elements that have radioactive characteristics.
		Americium MSN Encarta Find a description about the actinide series element and its chemical numbers.
		Lawrencium Learn about the last of the metals in the actinide series, discovered in 1961 at the UC Berkeley's Lawrence Radiation Lab.
	db.education-world.com /perl/browse?cat_id=11014 (516 words)

	The Actinide Research Quarterly: 1st Quarter 2004 (Site not responding. Last check: 2007-10-31)
		The chemistry and physics of the actinide elements (uranium, neptunium, plutonium, etc.) have always been of prime importance at Los Alamos, beginning with the early efforts to characterize the chemistry of plutonium during the Manhattan Project.
		The actinide series marks the emergence of 5f electrons in the valence shell.
		Plutonium is trapped in the middle, and for the delta-phase metal, the electrons seem to be in a unique state of being neither fully delocalized nor localized, which leads to novel electronic interactions and unusual physical and chemical behavior.
	www.lanl.gov /source/orgs/nmt/nmtdo/AQarchive/04spring/heavy.html (366 words)

	Actinide Series - Search Results - MSN Encarta
		Actinide Series, a series of 14 radioactive elements in the periodic table (Periodic Law) with atomic numbers 89 through 102.
		World Series : pictures of World Series games and players
		Search for books about your topic, "Actinide Series"
	encarta.msn.com /Actinide_Series.html (84 words)

	Class Definition for Class 205 - ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE ...
		Class 205 is an integral part of Class 204 (placed at the top of the schedule) and follows the schedule hierarchy, retaining all pertinent definitions and class lines of Class 204.
		and 249+ for nonelectrolytic processes of forming actinide series elements or compounds.
		The symbols must consist of a series successively formed, otherwise the process will be found in this class, subclass 118 and indented subclasses.
	www.uspto.gov /go/classification/uspc205/defs205.htm (3657 words)

	Actinide Series (Site not responding. Last check: 2007-10-31)
		Similar to the Rare Earth Actinide Series, this group has fifteen elements Actinium through Lawrencium.
		All the elements of this series are radioactive, decaying to elements of the lower atomic weight.
		The first four are available in nature only due to their long half- lives or are the decay products of long half - life elements.
	www.angelfire.com /ca/kenlab/Ass.html (81 words)

	Rare Earth
		Promethium in the Lanthanide Series and all the elements in the Actinide Series except for Thorium, Protactinium, and Uranium are called trans-uranium since they do not occur naturally in nature.
		Promethium in the Lanthanide Series and all the elements in the Actinide Series except for
		Uranium are called trans-uranium since they do not occur naturally in nature.
	www.matter-antimatter.com /rare_earth.htm (133 words)

	US PATENT SUBCLASS 423 / 3-- .~.~ Actinide series metal (At. No. 89+)
		(under subclass 2) Processes in which the radio-active compound comprises a metal of the actinide series, i.e., one having an atomic number of 89 or greater.
		84.1, for pyrometallurgical processes for obtaining actinide and trans-actinide series metals.
		Also, see section III of the Class 204 definition for the general class line between Class 204 and Class 423.
	www.patentec.com /data/class/defs/423/3.html (251 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #7219454 - Nature of the 5 electrons in the actinide series
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Nature of the 5 electrons in the actinide series
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=7219454 (100 words)

	Periodic Table
		Element Classification: Radioactive Rare Earth Element (Actinide Series)
		Name Origin: Named in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
		Name Origin: Named in honor of Alfred Nobel, who invented dynamite and founded Nobel prize.
	www.teachervision.fen.com /periodictable.php?group=E (285 words)

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	www.sciencedaily.com /releases/2006/01/060130032541.htm (1740 words)

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