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58
Ce
140.12
Cerium |
Appearance & Characteristics | Reactions |
Other Forms Radius | Conductivity | Abundance
General:
| Name: Cerium | Symbol: Ce |
| Group: Rare Earth, Lanthanide series | Atomic weight: 140.12 |
| Density @ 293 K: 6.78 g/cm3 | Atomic volume: 20.67 cm3/mol |
| Group: Rare Earth, Lanthanide series | Discovered: 1803 |
States
| State (s, l, g): solid | |
| Melting point: 1071 K (798 oC) | Boiling point: 3716 K (3443 oC) |
| Heat of fusion: 5.460 kJ/mol | Heat of vaporization: 414.0 kJ/mol |
Energies
| 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 |
Appearance & Characteristics
| Structure: fcc: face-centered cubic | Color: silvery-white |
| Uses: self-cleaning ovens(CeO2) | Toxicity: |
| Hardness: mohs | Characteristics: malleable |
Reactions
| Reaction with air: vigorous, w/ht => CeO2 | |
| Reaction with 6 M HCl: vigorous, => H2, CeCl3 | Reaction with 6 M HCl: vigorous, => H2, CeCl3 |
| Reaction with 15 M HNO3: mild, => Ce(NO3)3 | Reaction with 6 M NaOH: |
Other Forms
| Number of isotopes: 4 | Hydride(s): CeH2 CeH3 |
| Oxide(s): Ce2O3 CeO2 | Chloride(s): CeCl3 |
Radius
| 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 |
Conductivity
| Thermal conductivity: 11.3 J/m-sec-deg | |
| Electrical conductivity: 13.333 1/mohm-cm | Polarizability: 29.6 A^3 |
Abundance
| Source: Monazite(phosphate),bastnaesite | |
| Rel. abund. solar system: 0.055 log | Abundance earth's crust: 66 parts per million by weight |
| cost, pure: $57 per 100g | cost, bulk: $ per 100g |
