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ChemicalElements.com: Praseodymium -
Basic information, atomic structure, and isotopes.
http://www.chemicalelements.com/elements/pr.html ChemGlobe: Praseodymium -
Electronic, thermal, and steric data along with an isotope table.
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/59.html LANL: Praseodymium -
History, uses, production, and properties.
http://periodic.lanl.gov/elements/59.html WebElements: Praseodymium -
Extensive information on history, uses, occurrence, compounds, and properties.
http://www.webelements.com/webelements/elements/text/Pr/key.html Lenntech: Praseodymium -
Physical data, chemical properties, health and environmental effects.
http://www.lenntech.com/Periodic-chart-elements/Pr-en.htm Wikipedia: Praseodymium -
Properties of the element, including its history, applications, and characteristics.
http://en.wikipedia.org/wiki/Praseodymium EnvironmentalChemistry.com: Praseodymium -
Atomic structure, chemical and physical properties, and table of nuclides.
http://environmentalchemistry.com/yogi/periodic/Pr.html Visual Elements: Praseodymium -
Image, source, uses, physical information, and key isotopes.
http://www.chemsoc.org/viselements/pages/praseodymium.html It's Elemental: Praseodymium -
Basic physical and historical information.
http://education.jlab.org/itselemental/ele059.html
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