Periodic Table of Elements

71

Lutetium

174.97

Lutetium was independently discovered in 1907 by French scientist Georges Urbain, Austrian mineralogist Baron Carl Auer von Welsbach, and American chemist Charles James.

Name: Lutetium
Symbol: Lu
Atomic number: 71
Atomic weight: 174.97
State: solid
Group, period, block: n/a, 6, f
Color: silvery white
Classification: lanthanide
Electron configuration: 6s2 4f14 5d1
2,8,18,32,9,2

Physical properties

Density: 9.841 g/cm-3
Melting point: 1925 K,1652 C,3006 F
Boiling point: 3675 K,3402 C,6156 F

Atomic properties

Oxidation states: 3, 2, 1
Electronegativity: 1.27 (Pauling scale)
Ionization energies: 1st: 523.5 kJmol-1
Covalent radius: 1878 pm
Van der Waals radius: no data
  • Lu
  • Electron Configuration

Isotopes

There are two naturally occurring isotopes of lutetium exist, 175Lu, and 176Lu.