Home 73 Ta Tantalum back to the periodic table
 
Atomic number   73
Symbol   Ta
Atomic weight   180.9479
Density [g/cm3]   16.68
Melting point [°C]   3000
Boiling point [°C]   5430
1st Ionization energy [eV]   7.89
Electronic configuration   [Xe] 4f14 5d3  6s2
Oxidation number (most stable)   5
Atomic radius [pm]   143
Ionic radius [pm]   64 (5+)
Abundance in crustal rocks [ppm]   1.7
Origin of the name   named after Tantalus, father of Niobe (tantalum is closely related to niobium in the periodic table
Discovery   1802 by A. K. Eckeberg
Uses   as corrosion proof lining in the chemical apparatus engineering as well as for Ta-electrolytic capacitors, further Ta-Nb-alloys than high temperature resistant components in the turbine construction.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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