58
Ce
Cerium
140.1161
28181992
#58
Cerium
lanthanide· Solid·140.1161 u
Cerium is a chemical element with symbol Ce and atomic number 58. It is a soft, silvery, ductile metal which easily oxidizes in air. Cerium was named after the dwarf planet Ceres (itself named after the Roman goddess of agriculture).
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Identity
- Symbol
- Ce
- Atomic Number
- 58
- Atomic Mass
- 140.1161 u
- Category
- lanthanide
- Block
- f-block
- Period
- 6
- Group
- 3
- Appearance
- silvery white
- Year Discovered
- 1803 CE
- Discovered By
- Martin Heinrich Klaproth
- Named By
- Ceres
Electrons
- Configuration
- [Xe] 4f1 5d1 6s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 5d1 4f1
- Shells
- 2, 8, 18, 19, 9, 2
- Electronegativity
- 1.12
- Electron Affinity
- 55
- Oxidation States
- +4, +3
- Ionization Energies
- 534.4, 1050, 1949, 3547, 6325 … +1 more
Physical Properties
- State at
- Solid
- Melting Point
- 1068
- Boiling Point
- 3716
- Density
- 6.77
- Molar Heat
- 26.94 J/(mol·K)
- Crystal Structure
- FCC
- Magnetic Ordering
- Paramagnetic
Mechanical
- Covalent Radius
- 204 pm
- Metallic Radius
- 182 pm
- Mohs Hardness
- 2.5
- Brinell Hardness
- 412 MPa MPa
- Vickers Hardness
- 270 MPa MPa
- Bulk Modulus
- 21.5 GPa GPa
- Shear Modulus
- 13.5 GPa GPa
- Young's Modulus
- 33.6 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 11.3 W/(m K) W/(m·K)
- Electrical Conductivity
- 1.15 MS/m S/m
- Specific Heat
- 192 J/(kg K) J/(g·K)
- Heat of Vaporization
- 350 kJ/mol kJ/mol
- Heat of Fusion
- 5.46 kJ/mol kJ/mol
Abundance
- Universe
- 1.00 ppb
- Sun
- 4.00 ppb
- Meteorite
- 480 ppb
- Earth's Crust
- 66.5 ppm
- Ocean
- 1.20 ppt
- Human Body
- 0