71Solid
Lu 174.967 Atomic mass · uLanthanides
Lutetium
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.
Discovery 1907 (Georges Urbain)
K2L8M18N32O9P2
Physical properties
Values for the element in its standard state.
- Density
- 9.841g/cm³
- Melting point
- 1,936K
- Boiling point
- 3,675K
- Atomic radius
- 160pm
- Bonding type
- Metallic
- Molar heat
- 26.86J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 14 electrons; 5d, 1 electrons; 6s, 2 electrons;
[Xe] represents 54 core electrons. The full view shows them explicitly.
71 electrons Orbital order preserved from source
- Electronegativity
- 1.27Pauling scale
- First ionization energy
- 524kJ/mol
- Electron affinity
- 50kJ/mol
- Van der Waals radius
- Not available
Lu LutetiumAtomic number 71
524kJ/mol
Atomic numberGaps indicate unavailable data
About lutetium
- Appearance
- Silvery white
- Discovery
- 1907 (Georges Urbain)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.