General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles


Name Cerium Symbol Ce
atomic number 58 Atomic weight 140.12
Density @ 293 K 6.78 g/cm3 Atomic volume 20.67 cm3/mol
Group Rare Earth, Lanthanide series discovered 1803


state (s, l, g) s
melting point 1071.2 K boiling point 3743 K
Heat of fusion 5.460 kJ/mol Heat of vaporization 414.0 kJ/mol
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1st ionization energy 527.4 kJ/mole electronegativity 1.12
2nd ionization energy 1047 kJ/mole electron affinity 50 kJ/mole
3rd ionization energy 1949 kJ/mole Specific heat 0.19 J/gK
heat atomization 419 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,18,20,8,2 electron configuration [Xe] 4f2 6s2
minimum oxidation number 0 maximum oxidation number 4
min. common oxidation no. 0 max. common oxidation no. 4
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Appearance & Characteristics

structure fcc: face-centered cubic color silvery-white
uses self-cleaning ovens(CeO2) toxicity
hardness mohs characteristics malleable


reaction with air vigorous, w/ht = CeO2 reaction with 6M HCl vigorous, = H2, CeCl3
reaction with 6M HCl vigorous, = H2, CeCl3 reaction with 15M HNO3 mild, = Ce(NO3)3
reaction with 6M NaOH
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Other Forms

number of isotopes 4 hydride(s) CeH2 CeH3
oxide(s) Ce2O3 CeO2 chloride(s) CeCl3


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 182 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) 115 pm
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thermal conductivity 11.3 J/m-sec-deg electrical conductivity 13.333 1/mohm-cm
polarizability 29.6 A^3


source Monazite(phosphate),bastnaesite rel. abund. solar system 0.055 log
abundance earth's crust 1.8 log cost, pure 57 $/100g
cost, bulk $/100g
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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.