Stable isotope Cerium (Ce)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Ce-136 58 78 135.90714 0.19% 30.00-53.40% Oxide
Ce-138 58 80 137.90599 0.25% 13.60-41.60% Oxide
Ce-140 58 82 139.905435 88.48% >99.00% Oxide
Ce-142 58 84 141.909241 11.08% 93.50-95.10% Oxide

Properties of Cerium

Name Cerium
Symbol Ce
Atomic number 58
Atomic weight 140.115
Standard state Solid at 298 °K
CAS Registry ID 7440-45-1
Group in periodic table N/A
Period in periodic table 6
Block in periodic table f-block
Color Silvery white
Classification Metallic
Melting point 799 °C
Boiling point 3426 °C
Vaporization point 3434 ºC
Thermal conductivity 11 W/(m·K)
Electrical resistivity 75.0 µΩ·cm at 25 °C
Electronegativity 1.1
Specific heat 192 J/kg K
Heat of vaporization 350 kJ·mol-1
Heat of fusion 5.5 kJ·mol-1
Density of liquid 6.55 g/cm3 at 799 °C
Density of solid 6.77 g/cm3
Electronic configuration [Xe]4f15d16s2
Metallic radius (alpha form) 1.8247 Å (coordination number 12)
Atomic volume 20.696 cm3/mol
Common oxidation states +3, +4