Home 43 Tc Technetium back to the periodic table

 
Atomic number   43
Symbol   Tc
Atomic weight   98.9063
Density [g/cm3]   11.49
Melting point [°C]   2172
Boiling point [°C]   4600
1st Ionization energy [eV]   7.28
Electronic configuration   [Kr] 4d6 5s
Oxidation number (most stable)   7
Atomic radius [pm]   135.8
Ionic radius [pm]   ---
Abundance in crustal rocks [ppm]   ---
Origin of the name   (greek) technetos = artificial
Discovery   1925 by W. Noddack, I. Tacke and O. Berg
Uses   as catalyst for chemical processes.

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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