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Periodic Table
Elemental Facts: 
Symbol
 Pr
Atomic Number
 59
Atomic Mass
 140. 90765
Electron Configuration
2, 8, 18, 21,8,2
[Xe].4f3.6s2
Valence Number 2
Melting Point  1204°K, 931°C, 1708°F
Boiling Point 3785°K, 3512°C, 6354°F 
Family
Series
 6, Lanthanoid
Element Classification
 Rare Earth Metals
Density
 6.475g/c3
Crystal Structure Hexagonal
State of Matter
 Solid
Date of Discovery
 1885
Person Who Discovered C.F. Von Weslbach
Historical Facts and Elements Uses:
Uses:
1.  Useful  Alloy 
2.  Coloring Glass 
3.  Ceramics 
4.  A metal used in making Cigarette lighters 
5.  Studio lighting for motion pictures. 
6.  Flints for making  sparks

Praseodymium is soft, malleable, and ductile.  Its color is silvery yellow.  It is resistant to corrosion in the air.  It develops a green oxide that falls off when exposed to air.  As other rare other rare Earth Elements it must be kept under light oil or sealed in plastic.  It was discovered in 1885 by C.F. Aeur Van Wesbach.

            For more information:
 
This is only available to World Book Online subscribers.
 

 
Bibliography:
World  Book 2000 Encyclopedia
http://www.pearl1.lanl.gov/perodic/element/59.html, 12-13-01
http:nobel.scas.bcit.ca/resources/ptable/pr.html, 12-13-01
http://www.webelements.com/webelements/scholar/elements/praseodymium/key.html, 12-13-01
http://www.environmentalchemistry.com/yogi/periodic/Pr.html, 12-13-01
http://www.chemicalelements.com/elements/pr.html, 12-13-01
 

 
Periodic Table Links

 
Created By:
 Vincent  & Gavin 
Last Updated:
 December 17, 2001
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