INORGANIC CHEMISTRY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site praseodymium (Pr) Praseodymium. Image copyright: smart-elements.com A silver-yellow metallic element of the lanthanide series, first isolated in 1885. Its chief ores are monazite and bastnaesite. Soft, malleable, and ductile praseodymium is used in carbon electrodes for arc lamps. Its most common isotope is 141Pr (100%). atomic number 59 relative atomic mass 140.908 relative density 6.77 melting point 931°C (1,708°F) boiling point 3,512°C (6,354°F) Related category    • INORGANIC CHEMISTRY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP