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Atomic symbol - Lu
Atomic weight - 174.967
Atomic number - 71
Electron configuration - 2-8-18-32-9-2
Oxidation states - +3
State of matter - solid
Heavy metal-brittle
Discovered in 1907-1908 by Carl Auer von Welsbach and Georges Urbain
Boils at 3315 .C, melts at 1656 .C

Lutetium is the hardest and densest rare earth. The radioactive isotope has
been used to compare the age of meteorites and the age of earth.

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