praseodimio 139
praseodymium . ( Of the g p?)(do do s?, pale green, and d? d? µ?, twin brother). 1. m. No. radioactive chemical element atóm. 59. Rare-earth metal in the Earth's crust, is dispersed and accompanied by other lanthanides in minerals as the cerite. Green, as well as its salts has ParaMagnetic properties. Its oxides are used in metallurgy, as catalysts, and ceramic industries, and glass. (Símb.) Pr ).