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LANL: Lanthanum - http://periodic.lanl.gov/elements/57.html
Sources, properties, isotopes, and uses. |
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ChemicalElements.com: Lanthanum - http://www.chemicalelements.com/elements/la.html
Basic information, atomic structure, and isotopes. |
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Wikipedia: Lanthanum - http://en.wikipedia.org/wiki/Lanthanum
Properties of the element, including its history, applications, and characteristics. |
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It's Elemental: Lanthanum - http://education.jlab.org/itselemental/ele057.html
Basic physical and historical information. |
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EnvironmentalChemistry.com: Lanthanum - http://environmentalchemistry.com/yogi/periodic/La.html
Atomic structure, chemical and physical properties, and table of nuclides. |