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The Columbia Encyclopedia: Yttrium -
Overview for the general reader.
http://www.bartleby.com/65/yt/yttrium.html Lenntech: Yttrium -
Physical data, chemical properties, health and environmental effects.
http://www.lenntech.com/Periodic-chart-elements/Y-en.htm Visual Elements: Yttrium -
Image, animation, uses, physical information, and ionisation energies.
http://www.chemsoc.org/viselements/pages/yttrium.html It's Elemental: Yttrium -
Basic physical and historical information.
http://education.jlab.org/itselemental/ele039.html Wikipedia: Yttrium -
Properties of the element, including its history, applications, and characteristics.
http://en.wikipedia.org/wiki/Yttrium EnvironmentalChemistry.com: Yttrium -
Atomic structure, chemical and physical properties, and table of nuclides.
http://environmentalchemistry.com/yogi/periodic/Y.html LANL: Yttrium -
History, sources, properties, uses, and isotopes.
http://periodic.lanl.gov/elements/39.html ChemicalElements.com: Yttrium -
Basic information, atomic structure, and isotopes.
http://www.chemicalelements.com/elements/y.html WebElements: Yttrium -
Extensive information on history, uses, occurrence, compounds, and properties of the element.
http://www.webelements.com/webelements/elements/text/Y/key.html ChemGlobe: Yttrium -
Electronic, thermal, and steric data along with an isotope table.
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/39.html
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