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WebElements: Europium - http://www.webelements.com/webelements/elements/text/Eu/key.html
Extensive information on history, uses, occurrence, compounds, and properties. |
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LANL: Europium - http://periodic.lanl.gov/elements/63.html
History, production, properties, sources, and uses. |
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ChemicalElements.com: Europium - http://www.chemicalelements.com/elements/eu.html
Basic information, atomic structure, and isotopes. |
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Wikipedia: Europium - http://en.wikipedia.org/wiki/Europium
Properties of the element, including its history, applications, and characteristics. |
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It's Elemental: Europium - http://education.jlab.org/itselemental/ele063.html
Basic physical and historical information. |