Praseodymium
Chemical element
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Praseodymium is a chemical element; it has symbol Pr and the atomic number 59. It is the third member of the lanthanide series and is considered one of the rare-earth metals. It is a soft, silvery, malleable and ductile metal, valued for its... Wikipedia
Symbol: Pr
Discovered: 1885
Boiling point: 6,368°F (3,520°C)
Electron configuration: [Xe] 4f3 6s2
Atomic number: 59
Atomic mass: 140.90765 u
Melting point: 1,708°F (930.8°C)