PERIODIC ELEMENT
Ce (Cerium)

 



Atomic number : 58
Atomic mass : 140.12 g.mol-1
Electronegativity according to Pauling : 1.1
Density : 6.76 g.cm-3 at 20 °C
Melting point : 799 °C
Boiling point : 3426 °C
Vanderwaals radius : 0.181 nm
Ionic radius : 0.102 nm (+3) ; 0.087 nm (+4)
Isotopes : 9
Electronic shell : [ Xe ] 4f1 5d1 6s2
Energy of first ionisation : 526.8 kJ.mol-1
Energy of second ionisation : 1045 kJ.mol-1
Energy of third ionisation : 1945.6 kJ.mol-1
Energy of fourth ionisation : 3537 kJ.mol-1
Standard Potential : - 2.48 V (Ce3+/ Ce)
Discovered by : W. von Hisinger in 1903
 
Atomic Structure Uses (heat-resistant alloys)