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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

Notes:
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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