Periodic Table of the Elements: Praseodymium

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Periodic Table of the Elements: Praseodymium
Atomic Number:59
Atomic Symbol:Pr
 Praseodymiumpraseodymium
[Gr., =green twin], metallic chemical element; symbol Pr; at. no. 59; at. wt. 140.90765; m.p. 931°C;; b.p. 3,512°C;; sp. gr. about 6.8; valence +3 or +4. Praseodymium is a soft, malleable, ductile, silver-yellow metal.
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Atomic Weight:140.90765
Electron Configuration:2 · 8 · 18 21 · 8 · 2
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