58 Ce 140.1161

Cerium

LANTHANIDE

Phase: Solid

Discovered: Martin Heinrich Klaproth

Block: F

Summary

Cerium is a chemical element with symbol Ce and atomic number 58. It is a soft, silvery, ductile metal which easily oxidizes in air. Cerium was named after the dwarf planet Ceres (itself named after the Roman goddess of agriculture).

Appearance: silvery white

Source: Wikipedia

Physical Properties

Atomic Mass 140.1161 u

Density 6.77 g/cm³

Melting Point 1068 K

Boiling Point 3716 K

Molar Heat 26.94 J/(mol·K)

Electron Affinity 55 kJ/mol

Ionization Energies

1^st: 534.4 kJ/mol

2^nd: 1050 kJ/mol

3^rd: 1949 kJ/mol

4^th: 3547 kJ/mol

5^th: 6325 kJ/mol

6^th: 7490 kJ/mol