PR-138 stands for various terms. Discover the full forms, meanings, and possible interpretations of PR-138 across different fields and industries.
Symbol:"Pr" Atomic Number:"59" Atomic Mass: 140.91amu. Praseodymium is one of the elements in the lanthanide series of inner transition elements. It may also be classified as a rare earth element. This soft, silvery metal can be found in many minerals and even some cigarette lighter sparking mechanisms.
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