Pr	Z =  59	◊ ◊ ◊ ◊ ◊	Praseodymium
			From the Greek "prasios didymos", meaning "green twin"
(AM) Atomic Mass	140.9077  amu	♦	Oxidation States	+3
(BP) Boiling Point	3212  °C	♦	(MP) Melting Point	931  °C
(ρ) Density	6.77  g/cm3	♦	Crystal Structure	Hexagonal
( χ ) Electronegativity	1.1	♦	(AR) Atomic Radius	1.65  Å
Physical State	Solid	♦	(C) Heat Capacity	0.193  J/g °C
Electronic-Config	[Xe]  4f3  6s2	♦	(I1) First Ionization E	526.81  kJ/mol
(ΔHvap) Heat of Vaporization	331  kJ/mol	♦	(ΔHfus) Heat of Fusion	6.89  kJ/mol
Year of Discovery	1885	♦	Location of Discovery	Austria
(E°) Standard Potential	Pr2+⇔ Pr (-2.000 V),   Pr3+⇔ Pr (-2.353 V)
Stable isotopes	141Pr
Discovered/Synthesized by	Carl F. Auer von Welsbach
Natural Source	The mineral/ore bastnasite, monazite, loparite
Common Uses	Torchworker didymium eyeglasses, lighter flints, arc lamps, magnets, yellow glass
Other Info	Used in goggles for welders
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