59Pr

Praseodymium

Lanthanide

Praseodymium (Pr) is element 59, a lanthanide, in period 6 of the periodic table. Its standard atomic weight is 140.908, it melts at 931 °C and boils at 3520 °C. Discovered by Carl Gustaf Mosander, 1841.

Atomic Number59

SymbolPr

NamePraseodymium

Atomic Weight140.908 u

CategoryLanthanide

Period6

Melting Point931 °C

Boiling Point3520 °C

Density6.773 g/cm³

Electron Config[Xe] 4f3 6s2

Discovered ByCarl Gustaf Mosander, 1841

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