Home 75 Re Rhenium back to the periodic table
 
Atomic number   75
Symbol   Re
Atomic weight   186.207
Density [g/cm3]   21.03
Melting point [°C]   3180
Boiling point [°C]   5630
1st Ionization energy [eV]   7.88
Electronic configuration   [Xe] 4f14 5d5  6s2
Oxidation number (most stable)   7, 6, 4, 2, 1-
Atomic radius [pm]   137.0
Ionic radius [pm]   63 (4+)
Abundance in crustal rocks [ppm]   0.0007
Origin of the name   (lat.) Rhenus = river Rhine
Discovery   1925 by Noddack und I. Tacke
Uses   as alloying constituent of steel as well as for filaments in bulbs because of its high melting point and the good elasticity.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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