Name Rhenium
Symbol Re
Atomic Number 75
Atomic Mass 186.207 atomic mass unit
Number of Protons 75
Number of Neutrons 111
Number of Electrons 75
Melting Point 3180.0 C
Boiling Point 3627.0 C
Density 21.02 grams per cubic centimeter
Normal Phase Solid
Family Transition Metals
Period 6
Cost $250 per troy ounce



Origin of Name From the provinces along the Rhine River in Germany
Date and Place of Discovery In 1925 in Germany
Discovered by Ida Tacke-Noddack, Walter Noddack and Otto Carl Berg
Common Compounds
Interesting facts
  • It has the third highest melting point with tungsten and carbon being higher.
  • Only platinum, iridium and osmium are more dense.
  • It resembles manganese in chemical properties.
  • It is produced during the refinement of molybdenum.
  • When alloyed with molybdenum, the material is very conductive.
Common Uses
  • Catalysts in the production of high octane gasoline
  • Catalysts used in hydrogenation reactions
  • Jet engine parts
  • Filaments in spectrographs and ion gauges
  • Electrical contact material
  • Thermocouples
  • Photography


Photo Courtesy of About.com
Chemical Elements
Jefferson Lab
Los Alamos National Labs

Rhenium Atomic Structure Elements by Name Elements by Number Home