Basic Information

Name: Praseodymium 
Symbol: Pr 
Atomic Number: 59 
Atomic Mass: 140.90765 amu 
Melting Point: 935.0 °C (1208.15 K, 1715.0 °F) 
Boiling Point: 3127.0 °C (3400.15 K, 5660.6 °F) 
Number of Protons/Electrons: 59 
Number of Neutrons: 82 
Classification: Rare Earth 
Crystal Structure: Hexagonal 
Density @ 293 K: 6.77 g/cm3 
Color: Unknown
Date of Discovery: 1885 
Discoverer: C.F. Aver von Welsbach 
Name Origin: From the Greek words prasios (green) and didymos (twin) 
Uses: coloring glass and ceramics 
Obtained From: salts