Rhenium. Number 75. Re. Atomic weight: 186.207.
Electron Configuration
Melting Point
Boiling Point
Density
Color
Physical State at Room Temperature
Common Ion Charges
Reactions
Common Compounds
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[Xe] 6s2 4f14 5d5
3186 °C
5596 °C
21020 kg m^-3
Silver-white metallic
Solid
Re7+, Re6+
Reacts with heated oxygen to form rhenium (VII) oxide, does not react with water, reacts with heated fluoride, insoluble in HCl and HF, but dissolves in nitric acid and sulphric acid, does not react with bases
Rhenium hexafluoride, Rhenium tetrafluoride, Rhenium pentafluoride, Rhenium heptafluoride, Rhenium dioxide, Rhenium trioxide, Rhenium disulphide
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Discovery: Rhenium was discovered by Walter Noddack, Ida Tacke, and Otto Berg in 1925 in Germany. The element is named after the Rhine River. Rhenium is only found in ores such as gadolinite, and can be rarely found in meteorites. Rhenium was the last stable element to be discovered.
Uses: Rhenium are used as catalysts as they are resistant to poison from nitrogen, sulfur, or phosphorus. Rhenium filaments are used in spectrographs and ion gauges. Rhenium wires are used in flash lamps for photography.
Hazards: The toxicity of rhenium is unknown because it is so rare and is usually found in small amounts. Their compounds can be hazardous though it is due to other elements and not rhenium.
Uses: Rhenium are used as catalysts as they are resistant to poison from nitrogen, sulfur, or phosphorus. Rhenium filaments are used in spectrographs and ion gauges. Rhenium wires are used in flash lamps for photography.
Hazards: The toxicity of rhenium is unknown because it is so rare and is usually found in small amounts. Their compounds can be hazardous though it is due to other elements and not rhenium.