Pr - PraseodymiumAtomic Number: 59 Period Number:5 Group Number: None Praseodymium, which is mostly found in monazite, is a soft and silvery metal. There are no free element found in nature until now because it is so active. Praseodymium solution is yellow-green. There are only one stable isotope in nature: 141Pr.
Praseodymium is widely used in alloy, which has high strength. It is added to fiber optic cables as a doping agent where it is used as a signal amplifier. Praseodymium salts are used to give glasses and enamels a yellow color. Praseodymium is also a component of didymium glass, which is used to make certain types of welder's and glass blower's goggles.
Physical and Chemical properties: Atomic Weight: 140.90765 Melting Point: 1204 K Boiling Point: 3793 K Density: 6.77 g/cm3 Phase at Room Temperature: Solid Ionization Energy: 5.464 eV Oxidation State: +3
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