71
Lu
Lutetium
174.96681
28183292
#71
Lutetium
lanthanide· Solid·174.96681 u
Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths.
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Identity
- Symbol
- Lu
- Atomic Number
- 71
- Atomic Mass
- 174.96681 u
- Category
- lanthanide
- Block
- f-block
- Period
- 6
- Group
- 3
- Appearance
- silvery white
- Year Discovered
- 1907 CE
- Discovered By
- Georges Urbain
- Named By
- Lutetia
Electrons
- Configuration
- [Xe] 4f14 5d1 6s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d1
- Shells
- 2, 8, 18, 32, 9, 2
- Electronegativity
- 1.27
- Electron Affinity
- 33.4
- Oxidation States
- +3
- Ionization Energies
- 523.5, 1340, 2022.3, 4370, 6445
Physical Properties
- State at
- Solid
- Melting Point
- 1925
- Boiling Point
- 3675
- Density
- 9.841
- Molar Heat
- 26.86 J/(mol·K)
- Crystal Structure
- HEX
- Magnetic Ordering
- Paramagnetic
Mechanical
- Covalent Radius
- 187 pm
- Metallic Radius
- 174 pm
- Mohs Hardness
- 2
- Bulk Modulus
- 47.6 GPa GPa
- Shear Modulus
- 27.2 GPa GPa
- Young's Modulus
- 68.6 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 16.4 W/(m K) W/(m·K)
- Electrical Conductivity
- 1.85 MS/m S/m
- Specific Heat
- 154 J/(kg K) J/(g·K)
- Heat of Vaporization
- 414 kJ/mol kJ/mol
- Heat of Fusion
- 22 kJ/mol kJ/mol
Abundance
- Universe
- 100 ppt
- Sun
- 0.1 ppb
- Meteorite
- 28.0 ppb
- Earth's Crust
- 800 ppb
- Ocean
- 1.5e-7 ppm
- Human Body
- 0