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Use praseodymium in a sentence. a silvery, malleable chemical element, one of the rare-earth elements, whose salts are generally green in color and are used to color glasses and enamels: symbol, Pr; at. no. 59. Origin of praseodymium.
Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group.It is valued for its magnetic, electrical, chemical, and optical properties.It is too reactive to be found in native form, and when artificially prepared, it slowly develops a green oxide coating.n the 1930s it was found (Beck) that praseodymium dioxide could be precipitated from KOH/NaOH eutectic melts, by oxidation by electrochemistry, or by sodium chlorate. This formed the basis of a small-scale laboratory purification method. The relatively pure free metal itself was not prepared until 1931.