71
Lu
174.97
Lutetium
Element 71 · 174.97 u · d-block
lanthanide
The last and heaviest of the lanthanides. Used in PET scan detectors and as a catalyst in petroleum refining.
Phase (STP)
Solid
Melting Point
1652 °C
Boiling Point
3402 °C
Density
9.84 g/cm³
Electronegativity
1.27
Atomic Radius
175 pm
Ionization Energy
524 kJ/mol
Electron Affinity
33 kJ/mol
Discovered
1907 · Georges Urbain
Electron Configuration
[Xe] 4f14 5d1 6s2
Electron Orbitals
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