PERIODIC ELEMENT
Re (Rhenium)

 



Atomic number : 75
Atomic mass : 186.23 g.mol-1
Electronegativity according to Pauling : 1.9
Density : 20.5 g.cm-3 at 20 °C
Melting point : 3170 °C
Boiling point : 5627 °C
Vanderwaals radius : 0.138 nm
Isotopes : 9
Electronic shell : [Xe] 4f14 5d5 6s2
Energy of first ionisation : 759 KJ.mol-1
Standard potential : 0.25 V (ReO2 / Re)
Discovered by : Walter Noddack in 1925
 
Atomic Structure Uses (filaments for mass spectrographs)