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Praseodymium

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	WebElements: Praseodymium - http://www.webelements.com/webelements/elements/text/Pr/key.html Extensive information on history, uses, occurrence, compounds, and properties.
	LANL: Praseodymium - http://periodic.lanl.gov/elements/59.html History, uses, production, and properties.
	ChemicalElements.com: Praseodymium - http://www.chemicalelements.com/elements/pr.html Basic information, atomic structure, and isotopes.
	Wikipedia: Praseodymium - http://en.wikipedia.org/wiki/Praseodymium Properties of the element, including its history, applications, and characteristics.
	It's Elemental: Praseodymium - http://education.jlab.org/itselemental/ele059.html Basic physical and historical information.

	EnvironmentalChemistry.com: Praseodymium - http://environmentalchemistry.com/yogi/periodic/Pr.html Atomic structure, chemical and physical properties, and table of nuclides.
	Visual Elements: Praseodymium - http://www.chemsoc.org/viselements/pages/praseodymium.html Image, source, uses, physical information, and key isotopes.
	ChemGlobe: Praseodymium - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/59.html Electronic, thermal, and steric data along with an isotope table.
	Lenntech: Praseodymium - http://www.lenntech.com/Periodic-chart-elements/Pr-en.htm Physical data, chemical properties, health and environmental effects.

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