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Topics related to "actinide"

actinide series
actinide series a series of radioactive metallic elements in Group 3 of the periodic table . Members of the series are often called actinides, although actinium (at. no. 89) is not always considered a member of the series. The series always includes the 14 elements with atomic numbers 90 through... Read more
transactinide elements
transactinide elements , in chemistry, elements with atomic numbers greater than that of lawrencium (at. no. 103), the last member of the actinide series. See transuranium elements . ... Read more
transition elements
transition elements or transition metals, in chemistry, group of elements characterized by the filling of an inner d electron orbital as atomic number increases. This includes the elements from titanium to copper, and those lying in the columns below them in the periodic table . Many of the ... Read more
fermium
fermium [for Enrico Fermi ], artificially produced radioactive chemical element; symbol Fm; at. no. 100; mass no. of most stable isotope 257; m.p. 1,527°C; b.p. and sp. gr. unknown; valence +2, +3. Fermium is a member of Group 3 of the periodic table . The physical properties of fermium are l... Read more
lawrencium
lawrencium artificially produced radioactive chemical element; symbol Lr; at. no. 103; mass number of most stable isotope 262; m.p. about 1,627°C; b.p. and sp. gr. unknown; valence +3. Lawrencium is the last member of the actinide series of elements found in Group 3 of the periodic table . L... Read more
mendelevium
mendelevium , artificially produced radioactive chemical element; symbol Md; at. no. 101; mass no. of most stable isotope 258; m.p. 827°C; b.p. and sp. gr. unknown; valence +1, +2, +3. Mendelevium is a metal of the actinide series in Group 3 of the periodic table . The ninth transuranium ele... Read more
neptunium
neptunium , radioactive chemical element; symbol Np; at. no. 93; at. wt. 237.0482; m.p. about 640°C; b.p. 3,902°C (estimated); sp. gr. 20.25 at 20°C; valence +3, +4, +5, or +6. Neptunium is a ductile, silvery radioactive metal. It is a member of the actinide series in Group 3 of the p... Read more
nobelium
nobelium , artificially produced radioactive chemical element; symbol No; at. no. 102; mass no. of most stable isotope 259; m.p. 827°C; b.p. and density unknown; valence +2, +3. It is a metal of the actinide series in Group 3 of the periodic table . Nobelium was the 10th transuranium element... Read more
rare-earth metals
rare-earth metals in chemistry, group of metals including those of the lanthanide series and actinide series , usually yttrium , sometimes scandium and thorium , and rarely zirconium . Promethium, which is not found in nature, is not usually considered a rare-earth metal. The metals usually... Read more
actinium
actinium [Gr.,=like a ray], radioactive chemical element; symbol Ac; at. no. 89; at. wt. 227.0278; m.p. about 1,050°C; b.p. 3,200°C±300°C; sp. gr. 10.07; valence +3. Actinium is a silver-white metal with a cubic crystalline structure. It is found with uranium minerals in pitchbl... Read more

Encyclopedia entries related to "actinide"

actinide series
Book article from: The Columbia Encyclopedia, Sixth Edition actinide series a series of radioactive metallic elements in Group 3 of the periodic...elements . Elements with atomic numbers greater than 103 are not members of the actinide series; element 104 ( rutherfordium ) is the first of the transactinide...
Actinides
Encyclopedia entry from: The Gale Encyclopedia of Science ...order of increasing atomic number, the actinide series members are: actinium, thorium...but with the transition metals.) The actinide elements share the following properties...actinium, are known as actinides. All actinide metals are prepared on a scale by the...
Element, Transuranium
Encyclopedia entry from: The Gale Encyclopedia of Science ...of elements that began back at milepost 89: the actinides. Actinide Road runs from milepost 89 to 103, so it overlaps the middle...transuranium trip. (The road signs between 92 and 103 read both Actinide Road and Transuranium Highway.) The actinides and all of...
Periodic Table of the Elements
Book article from: The Columbia Encyclopedia, Sixth Edition ...Hg 81 Tl 82 Pb 83 Bi 84 Po 85 At 86 Rn 87 Fr 88 Ra 89-103 Actinide Series 104 Rf 105 Db 106 Sg 107 Bh 108 Hs 109 Mt 110 Ds 111...62 Sm 63 Eu 64 Gd 65 Tb 66 Dy 67 Ho 68 Er 69 Tm 70 Yb 71 Lu Actinide Series (Radioactive Rare Earth Elements) 89 Ac 90 Th 91 Pa...
americium
Book article from: World Encyclopedia americium (symbol Am ) Radioactive metallic element of the actinide series , first made (1944) by US nuclear chemist Glenn Seaborg (1912–99) and others by neutron bombardment of plutonium...
uranium
Book article from: World Encyclopedia uranium (symbol U ) Radioactive, metallic element, one of the actinide series . Discovered in 1789 by the German chemist Martin Klaproth, it is used in nuclear reactors and bombs. The isotope U 238...
transuranic elements
Book article from: World Encyclopedia ...transuranium elements ) Elements with atomic numbers higher than that of uranium (92), the best known of which are members of the actinide series (atomic numbers 89 to 103). All transuranic elements are radioactive. Only neptunium and plutonium occur naturally...
Glenn Theodore Seaborg
Encyclopedia entry from: Encyclopedia of World Biography ...synthesized and separated elements 95 and 96, americium and curium, respectively, and Seaborg fashioned the concept of the actinide group to place the heavy elements in the periodic table. This idea enabled him to predict the chemical properties of still...
einsteinium
Book article from: The Columbia Encyclopedia, Sixth Edition ...of Group 3 of the periodic table ; its chemical properties are believed to be similar to those of the other members of the actinide series . The seventh transuranium element to be discovered, einsteinium was isolated in Dec., 1952, by Albert Ghiorso and...
transuranium elements
Book article from: The Columbia Encyclopedia, Sixth Edition ...radioactive elements with atomic numbers greater than that of uranium (at. no. 92). All the transuranium elements of the actinide series were discovered as synthetic radioactive isotopes at the Univ. of California at Berkeley or at Argonne National Laboratory...

Dictionary entries related to "actinide"

actinide
Book article from: The Oxford Pocket Dictionary of Current English ac·ti·nide / ˈaktəˌnīd / • n. Chem. any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table. They are all radioactive, the heavier members being extremely unstable and not of
thorium
Book article from: The Oxford Pocket Dictionary of Current English tho·ri·um / ˈ[unvoicedth]ôrēəm / • n. the chemical element of atomic number 90, a white radioactive metal of the actinide series. (Symbol: Th )
fermium
Book article from: The Oxford Pocket Dictionary of Current English ...m; ˈfər- / • n. the chemical element of atomic number 100, a radioactive metal of the actinide series. Fermium does not occur naturally and was discovered in 1953 in the debris of the first hydrogen bomb explosion...
lawrencium
Book article from: The Oxford Pocket Dictionary of Current English ...x2C8;rensēəm / • n. the chemical element of atomic number 103, a radioactive metal of the actinide series. Lawrencium does not occur naturally and was first made by bombarding californium with boron nuclei. (Symbol: Lr...
berkelium
Book article from: The Oxford Pocket Dictionary of Current English ber·ke·li·um / bərˈkēlēəm / • n. the chemical element of atomic number 97, an artificial radioactive metal of the actinide series. (Symbol: Bk )
nobelium
Book article from: The Oxford Pocket Dictionary of Current English ...x2C8;belēəm / • n. the chemical element of atomic number 102, a radioactive metal of the actinide series. Nobelium does not occur naturally and was first produced by bombarding curium with carbon nuclei. (Symbol: No )
curium
Book article from: The Oxford Pocket Dictionary of Current English ...x14F;rēəm / • n. the chemical element of atomic number 96, a radioactive metal of the actinide series. Curium does not occur naturally and was first made by bombarding plutonium with helium ions. (Symbol: Cm )
mendelevium
Book article from: The Oxford Pocket Dictionary of Current English ...m; -ˈlā- / • n. the chemical element of atomic number 101, a radioactive metal of the actinide series. It does not occur naturally and was first made in 1955 by bombarding einsteinium with helium ions. (Symbol: Md...
neptunium
Book article from: The Oxford Pocket Dictionary of Current English ...x14D;nēəm / • n. the chemical element of atomic number 93, a radioactive metal of the actinide series. Neptunium was discovered as a product of the bombardment of uranium with neutrons, and occurs only in trace amounts...
-ide
Book article from: A Dictionary of Earth Sciences ...meaning ‘son of’, a suffix attached to the name of an element which is a member of a series (e.g. actinide, halide), or to the more electronegative element or radical in a binary compound (e.g. sodium chloride).

Related newspaper, magazine, and trade journal articles from HighBeam Research

COMPUTATIONAL ACTINIDE CHEMISTRY: ARE WE THERE YET?
News Wire article from: US Fed News Service, Including US State News; 8/21/2007; 471 words ; ...Manhattan project in World War II, actinide chemistry has been essential for...chemical and physical properties of actinide compounds and materials using first-principle theory. Computational actinide chemistry may bring that goal closer...
ACTINIDE RESEARCH IN REVIEWS OF MODERN PHYSICS
News Wire article from: US Fed News Service, Including US State News; 7/8/2009; 655 words ; ...Modern Physics that refines decades of actinide science and may just become the preeminent...Kingdom wrote "Nature of the 5f States in Actinide Metals," which describes the electronic...actinides and demonstrates the importance of actinide science to a broad class of scientists...
LAWRENCE LIVERMORE NATIONAL LABORATORY PUBLISHES ACTINIDE RESEARCH IN REVIEWS OF MODERN PHYSICS
News Wire article from: US Fed News Service, Including US State News; 2/16/2009; 700+ words ; ...Modern Physics that refines decades of actinide science and may just become the preeminent...Kingdom wrote "Nature of the 5f States in Actinide Metals," which describes the electronic...actinides and demonstrates the importance of actinide science to a broad class of scientists...
Japanese Inventors Develop Actinide Element Separation Method
News Wire article from: US Fed News Service, Including US State News; 5/10/2007; 520 words ; ...have developed a method for separation of actinide elements. According to the U.S. Patent...relates to a "method for separation of actinide elements comprising feeding a solution containing actinide elements such as americium, curium...
ARGONNE'S CHIARIZIA HONORED FOR ACTINIDE SEPARATION WORK
News Wire article from: US Fed News Service, Including US State News; 8/4/2006; 640 words ; ...has been awarded the Glenn T. Seaborg Actinide Separations Award. Chemist Renato Chiarizia...reprocessing into new fuel. Separating actinide from the waste stream would also make...freeing up room in the repositories. Actinide separation is generally done through...
Recent advances in actinide science.(Brief Article)(Book Review)
Magazine article from: SciTech Book News; 3/1/2007; 560 words ; 9780854046782 Recent advances in actinide science. Ed. by Iain May et al. Royal...the basic science and research on the actinide series--those 14 chemical elements...curium and berkelium, properties of minor actinide compounds relevant to nuclear fuel technology...
Nevada, Massachusetts Inventors Develop Actinide Elements Isotopes Separation System
News Wire article from: US Fed News Service, Including US State News; 11/25/2008; 497 words ; ...have developed a method for enriching actinide element isotope. According to the abstract...provides methods for separating isotopes of actinide elements such as uranium using microorganisms...bacteria. The microorganisms reduce the actinide element to form a precipitate, which...
French Inventors Develop Mixed Actinide Oxide Preparation Method
News Wire article from: US Fed News Service, Including US State News; 2/6/2007; 437 words ; ...precipitating actinides and a method for preparing mixed actinide oxides. According to the U.S. Patent & Trademark...present invention generally relates to the preparation of mixed actinide oxides, such as mixed oxides of uranium and plutonium, by...
Synthesis of Lanthanide and Actinide Compounds.
Magazine article from: Chemistry and Industry; 8/5/1991; ; 700+ words ; ...best synthetic methods for the major classes of lanthanide and actinide compounds. Expert contributors have provided chapters on the...binary and ternary halides of the actinides and the ternary actinide oxides are still to be covered in future volumes, as well...
A NEW UNDERSTANDING OF CRYSTAL STRUCTURE OF ACTINIDE METALS
News Wire article from: US Fed News Service, Including US State News; 6/5/2007; 700+ words ; ...magnetically stabilized crystal structures also include the heavy actinide element, curium (Cm). In a diamond-anvil cell study...and Nature) greatly further our understanding of the middle actinide metals - plutonium, americium and curium."Contact: Anne...