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Noun
praseodymium
Pr
atomic number 59
Definition: a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
Definition: A chemical element (symbol Pr) with an atomic number of 59, a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties.