Home 44 Ru Ruthenium back to the periodic table
 
Atomic number   44
Symbol   Ru
Atomic weight   101.07
Density [g/cm3]   12.45
Melting point [°C]   2310
Boiling point [°C]   3900
1st Ionization energy [eV]   7.37
Electronic configuration   [Kr] 4d7 5s
Oxidation number (most stable)   8, 6, 4, 3, 2, 0, 2-
Atomic radius [pm]   134
Ionic radius [pm]   62 (4+)
Abundance in crustal rocks [ppm]   0.0001
Origin of the name   (lat.) ruthenia = Russia
Discovery   1844 by the Russian Carl Claus
Uses   as alloying constituent with platinum and palladium.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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