praseodymium in Bulgarian

A chemical element (symbol Pr) with an atomic number of 59, a soft, silvery, malleable and ductile rare earth metal, valued for its magnetic, electrical, chemical, and optical properties.

A chemical element (symbol Pr) with an atomic number of 59, a soft, silvery, malleable and ductile rare earth metal, valued for its magnetic, electrical, chemical, and optical properties.