Rhenium

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Rhenium
Name Rhenium
Symbol Re
Atomic number 75
Atomic mass 186.207 amu
Normal state Solid
Classification Transition Metals
Crystal structure Hexagonal
Color Silver-White metal, or a Gray powder
Date of discovery 1925
Name of discoverer Walter Noddack, Ida Tacke, and Otto Berg
Name origin From the Greek name for the Rhine River, Rhenus.
Uses It is added to tungsten and molybdenum alloys. Also used in refractory metal components of missiles, electronic filaments, electrical contacts, high-temperature thermocouplers, oven filaments, electrodes, igniters for flash bulbs, jewelry, plating of metals by electrolysis and vapor-phase deposition.
Obtained from Found in small amounts in gadolinite and molybdenite; usually extracted from the flue dusts of molybdenum smelters.
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