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1. WebElements: Protactinium

Extensive information on history, uses, occurrence, compounds, and properties.
http://www.webelements.com/webelements/elements/text/Pa/key.html - 21-04-2000 - [detailed information]
Rating: [7.00] Votes: [1778]

2. ChemicalElements.com: Protactinium

Basic information, atomic structure, and isotopes.
http://www.chemicalelements.com/elements/pa.html - 03-09-2003 - [detailed information]
Rating: [6.00] Votes: [1521]

3. LANL: Protactinium

Basic information and history.
http://pearl1.lanl.gov/periodic/elements/91.html - 28-05-2003 - [detailed information]
Rating: [6.00] Votes: [494]

4. Britannica Nobel Prize: Protactinium

Overview and basic data.
http://www.britannica.com/nobel/micro/483_52.html - 12-04-2001 - [detailed information]
Rating: [5.00] Votes: [222]

5. ChemGlobe: Protactinium

Electronic, thermal, and steric data along with an isotope table.
http://www.vcs.ethz.ch/chemglobe/ptoe/_/91.html - 19-12-2001 - [detailed information]
Rating: [5.00] Votes: [292]

6. EnvironmentalChemistry.com: Protactinium

Atomic structure, chemical and physical properties, and table of nuclides.
http://environmentalchemistry.com/yogi/periodic/Pa.html - 18-09-2003 - [detailed information]
Rating: [5.00] Votes: [1354]

7. Visual Elements: Protactinium

General and physical information, source, and key isotopes.
http://www.chemsoc.org/viselements/pages/protactinium.html - 23-05-2002 - [detailed information]
Rating: [5.00] Votes: [1768]

8. Protactinium

Data tables and historic information.
http://www.scescape.net/~woods/elements/protactinium.html - 04-10-2001 - [detailed information]
Rating: [4.00] Votes: [2344]

9. Radiochemistry of Protactinium
Full text of the monograph by H. W. Kirby (Mound Laboratory, Miamisburg, Ohio). [PDF] (December, 1959)
http://lib-www.lanl.gov/cgi-bin/getfile?rc000046.pdf - 13-06-2000 - [detailed information]
Rating: [0.00] Votes: [2065]

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