General: |
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Name: Cerium
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Symbol: Ce
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Group: Rare Earth, Lanthanide series
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Atomic weight: 140.12
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Density @ 293 K: 6.78 g/cm3
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Atomic volume: 20.67 cm3/mol
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Group: Rare Earth, Lanthanide series
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discovered: 1803
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States: |
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state (s, l, g): s
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melting point: 1071.2 K
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boiling point: 3743 K
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Heat of fusion: 5.460 kJ/mol
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Heat of vaporization: 414.0 kJ/mol
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Energies: |
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1st ionization energy: 527.4 kJ/mole
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electronegativity: 1.12
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2nd ionization energy: 1047 kJ/mole
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electron affinity: 50 kJ/mole
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3rd ionization energy: 1949 kJ/mole
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Specific heat: 0.19 J/gK
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heat atomization: 419 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 2,8,18,20,8,2
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electron configuration: [Xe] 4f2 6s2
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minimum oxidation number: 0
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maximum oxidation number: 4
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min. common oxidation no.: 0
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max. common oxidation no.: 4
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Appearance & Characteristics: |
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structure: fcc: face-centered cubic
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color: silvery-white
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uses: self-cleaning ovens(CeO2)
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toxicity:
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hardness: mohs
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characteristics: malleable
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Reactions: |
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reaction with air: vigorous, w/ht =>CeO2
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reaction with 6M HCl: vigorous, =>H2, CeCl3
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reaction with 6M HCl: vigorous, =>H2, CeCl3
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reaction with 15M HNO3: mild, =>Ce(NO3)3
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reaction with 6M NaOH:
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Other Forms: |
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number of isotopes: 4
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hydride(s): CeH2 CeH3
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oxide(s): Ce2O3 CeO2
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chloride(s): CeCl3
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Radius: |
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ionic radius (2- ion): pm
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ionic radius (1- ion): pm
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atomic radius: 182 pm
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ionic radius (1+ ion): pm
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ionic radius (2+ ion): pm
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ionic radius (3+ ion): 115 pm
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Conductivity: |
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thermal conductivity: 11.3 J/m-sec-deg
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electrical conductivity: 13.333 1/mohm-cm
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polarizability: 29.6 A^3
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Abundance: |
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source: Monazite(phosphate),bastnaesite
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rel. abund. solar system: 0.055 log
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abundance earth's crust: 1.8 log
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cost, pure: 57 $/100g
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cost, bulk: $/100g
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