Name :  Rhenium
Symbol :  Re
Atomic Number :  75
Atomic Weight :  186.207
Specific Heat :  0.13 J/gK
Melting Point :  3180°C
Vaporization :  715.0 kJ/mol
Boiling Point :  5627°C (estimated)
Electronegativity :  1.9
Density@293 K :  21.0 g/cm³
Discovered :  Walter Noddack, Ida Tacke, Otto Berg, Germany, 1925
Description :  Rare and costly, dense, silvery-white metal.
Uses :  Mixed with tungsten or platinum to make filaments for mass spectrographs. Its main value is as a trace alloying agent for hardening metal components that are subjected to continuous frictional forces.