Atomic Number 59     Atomic Mass 140.907647     Density 6.773 g/mL

Electronegativity 1.13     Melting Point 931°C     Boiling Point 3512°C

Natural Isotope Pr-141 100%

Abbreviated Electron Configuration [Xe] 4f³ 6s²

Discovered by C. F. Auer von Welsbach in 1885.