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It's Elemental: Actinium -
Basic physical and historical information.
http://education.jlab.org/itselemental/ele089.html LANL: Actinum -
Basic information and history.
http://periodic.lanl.gov/elements/89.html ChemicalElements.com: Actinium -
Basic information, atomic structure, and isotopes.
http://www.chemicalelements.com/elements/ac.html EnvironmentalChemistry.com: Actinium -
Atomic structure, properties, and table of nuclides.
http://environmentalchemistry.com/yogi/periodic/Ac.html ChemGlobe: Actinium -
Electronic, thermal, and steric data along with an isotope table.
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/89.html Visual Elements: Actinium -
Image, sources, biological role, key isotopes, and oxidation states.
http://www.chemsoc.org/viselements/pages/actinium.html Lenntech: Actinium -
Physical data, chemical properties, health and environmental effects.
http://www.lenntech.com/Periodic-chart-elements/Ac-en.htm Wikipedia: Actinium -
Details the properties of the element, including its history, applications, and characteristics.
http://en.wikipedia.org/wiki/Actinium WebElements: Actinium -
Extensive information on history, uses, occurrence, compounds, and properties.
http://www.webelements.com/webelements/elements/text/Ac/key.html
Blog5 Game Cheats - MPAA - New York Hotels - Loans - Mobile Phones--BEGIN VALIDATION CODE--
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