About site: Chemistry/Elements/Rutherfordium - LANL: Rutherfordium
Return to Science
  About site: http://periodic.lanl.gov/elements/104.html

Title: Chemistry/Elements/Rutherfordium - LANL: Rutherfordium Basic information, history, and isotopes.
Lenntech__Rutherfordium Physical data and chemical properties.

Rutherfordium Historic information.

Visual_Elements__Rutherfordium Physical information, key isotopes, and ionisation energies.

WebElements__Rutherfordium Information on history and properties.

Cesium Data tables and historic information.

ChemicalElements_com__Cesium Basic information, atomic structure, and isotopes table.


  Alexa statistic for http://periodic.lanl.gov/elements/104.html





Get your Google PageRank






Please visit: http://periodic.lanl.gov/elements/104.html
  Related sites for http://periodic.lanl.gov/elements/104.html
    EnvironmentalChemistry_com__Cesium Atomic structure, chemical and physical properties, and table of nuclides.
    It\'s_Elemental__Cesium Basic physical and historical information.
    LANL__Cesium History, sources, properties, and costs.
    Lenntech__Cesium Physical data, chemical properties, health and environmental effects.
    USGS_Minerals_Information__Cesium Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
    Visual_Elements__Caesium Image, general and physical information, and key isotopes.
    WebElements__Caesium Extensive information on history, uses, occurrence, compounds, and properties.
    Wikipedia__Caesium Properties of the element, including its history, applications, and characteristics.
    Radiochemistry_of_Cesium Full text of the monograph by M. T. Kinsley (Brookhaven National Laboratory, Upton, New York). [PDF] (February, 1961)
    ChemicalElements_com__Cobalt Basic information, atomic structure, and isotopes.
    Cobalt Data tables and historic information.
    EnvironmentalChemistry_com__Cobalt Atomic structure, chemical and physical properties, and table of nuclides.
    It\'s_Elemental__Cobalt Basic physical and historical information.
    LANL__Cobalt History, sources, properties, and uses.
    Lenntech__Cobalt Physical data, chemical properties, health and environmental effects.
    USGS_Minerals_Information__Cobalt Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
    Visual_Elements__Cobalt Image, general and physical information, source, uses, biological role, key isotopes, and ionisation energies.
    WebElements__Cobalt Extensive information on history, uses, occurrence, compounds, and properties of the element.
    Wikipedia__Cobalt Properties of the element, including its history, applications, and characteristics.
    Radiochemistry_of_Cobalt Full text of the monograph by L.C. Bate (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (September, 1961)
    ChemicalElements_com__Potassium Basic information, atomic structure, and isotopes.
    EnvironmentalChemistry_com__Potassium Atomic structure, chemical and physical properties, and table of nuclides.
    It\'s_Elemental__Potassium Basic physical and historical information.
    LANL__Potassium Sources, uses, properties, and isotopes.
    Lenntech__Potassium Physical data, chemical properties, and health effects.
    Potassium Data tables and historic information.
    Visual_Elements__Potassium Image, animation, source, uses, physical information, and key isotopes.
    WebElements__Potassium Extensive information on history, uses, occurrence, compounds, and properties of the element.
    Wikipedia__Potassium Properties of the element, including its history, applications, and characteristics.
    Radiochemistry_of_Potassium Full text of the monograph by William T. Mullins and G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (November, 1961)
    ChemicalElements_com__Scandium Basic information, atomic structure, and isotopes.
    Discovery_of_Scandium Article by Lars Fredrick Nilson.
    EnvironmentalChemistry_com__Scandium Atomic structure, chemical and physical properties, and table of nuclides.
    It\'s_Elemental__Scandium Basic physical and historical information.
    LANL__Scandium History, sources, properties, costs, and uses.
    Scandium Data tables and historic information.
    USGS_Minerals_Information__Scandium Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
    Visual_Elements__Scandium Image, animation, sources, use, physical information, and ionisation energies.
    WebElements__Scandium Extensive information on history, uses, occurrence, compounds, and properties of the element.
    Wikipedia__Scandium Properties of the element, including its history, applications, and characteristics.
This is now2007.com cache of m/ as retrieved on 2008.12.04 now2007.com's cache is the snapshot that we took of the page as we crawled the web. The page may have changed since that time.
Rutherfordium /* No Right Click Copyright Mike McGrath (http://website.lineone.net/~mike_mcgrath/) To add more shock to your site, visit www.DHTML Shock.com */ Back to the Periodic Table      

Rutherfordium

Atomic Number: 104 Atomic Radius: -- Atomic Symbol: Rf  Melting Point: -- Atomic Weight: 261 Boiling Point: -- Electron Configuration: [Rn]7s25f146d2 Oxidation States: 4

History

In 1964, workers at the Joint Nuclear Research Institute at Dubna (U.S.S.R.) bombarded plutonium with accelerated 113 to 115 MeV neon ions. By measuring fission tracks in a special glass with a microscope, they detected an isotope that decays by spontaneous fission. They suggested that this isotope, which had a half-life of 0.3 +/- 0.1 s might be 260-104, produced by the following reaction: 242Pu + 22Ne --> 260Rf +4n. Element 104, the first transactinide element, is expected to have chemical properties similar to those of hafnium. It would, for example, form a relatively volatile compound with chlorine (a tetrachloride). The Soviet scientists have performed experiments aimed at chemical identification, and have attempted to show that the 0.3-s activity is more volatile than that of the relatively nonvolatile actinide trichlorides. This experiment does not fulfill the test of chemically separating the new element from all others, but it provides important evidence for evaluation. Data issued by Soviet scientists reduced the half-life of the isotope they worked with from 0.3 to 0.15 s.

Isotopes

In 1969 Ghiorso, Nurmia, Harris, K.A.Y. Eskola, and P.L. Eskola of the University of California at Berkeley reported that they had positively identified two, and possibly three isotopes of Element 104. The group indicated that, after repeated attempts, they produced isotope 260104 reported by the Dubna groups in 1964. The discoveries at Berkeley were made by bombarding a target of 249Cf with 12C nuclei of 71 MeV, and 13C nuclei of 69 MeV. The combination of 12C with 249Cf followed by instant emission of four neutrons produced Element 257104. This isotope has a half-life of 4 to 5 s, decaying by emitting an alpha particle into 253No, with a half-life of 105 s. The same reaction, except with the emission of three neutrons, was thought to have produced 258104 with a half-life of about 1/100 s. Element 259104 is formed by the merging of a 13C nuclei with 249Cf, followed by emission of three neutrons. This isotope has a half-life of 3 to 4 s, and decays by emitting an alpha particle into 255No, which has a half-life of 185 s. Thousands of atoms of 257104 and 259104 have been detected. The Berkeley group believes their identification of 258-104 is correct, but attaches less confidence to this work than to their work on 257104 and 259104. Picture: Ernest R. Rutherford Sources: CRC Handbook of Chemistry and Physics , American Chemical Society. , IUPAC Chemistry Division HomeLANL Home Last Updated: 12/15/2003; © Chemistry Operations Operated by the University of California for the US Department of Energy   | Help | Copyright © UC 2003 | Disclaimer
 

Basic

information,

history,

and

isotopes.

http://periodic.lanl.gov/elements/104.html

LANL: Rutherfordium 2008 December

dvd rental

dvd


Basic information, history, and isotopes.

Rules

© 2005 Internet Explorer 5+ or Netscape 6+
Recommended Sites: 1. Arts - Business - Computers - Games - Health - Home - Kids and Teens - News - Recreation - Reference - Regional - Science - Shopping - Society - Sports - World Miss Gallery - Top Anime Hentai - DVD rental by mail - Gundam 00 - Property for sale in Spain - Michigan Flag - Loans - Dedicated Servers
2008-12-04 09:49:02

Copyright 2005, 2006 by Webmaster
Websites is cool :)