59 Pr 140.907662

Praseodymium

LANTHANIDE

Phase: Solid

Discovered: Carl Auer von Welsbach

Block: F

Summary

Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is valued for its magnetic, electrical, chemical, and optical properties.

Appearance: grayish white

Source: Wikipedia

Physical Properties

Atomic Mass 140.907662 u

Density 6.77 g/cm³

Melting Point 1208 K

Boiling Point 3403 K

Molar Heat 27.2 J/(mol·K)

Electron Affinity 93 kJ/mol

Ionization Energies

1^st: 527 kJ/mol

2^nd: 1020 kJ/mol

3^rd: 2086 kJ/mol

4^th: 3761 kJ/mol

5^th: 5551 kJ/mol