rhenium
Sign in to saveRhenium is a chemical element; it has symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. It has one of the highest melting and boiling points of any element. It resembles manganese and technetium chemically and is mainly obtained as a by-product of the extraction and refinement of molybdenum and copper ores. It shows in its compounds a wide variety of oxidation states ranging from −3 to +7.
AI overview
Rhenium is a rare, silvery-gray metal with an exceptionally high melting point, making it one of the most heat-resistant elements known. Because it's so uncommon in Earth's crust and typically extracted as a byproduct of mining other metals like molybdenum and copper, rhenium is valuable for specialized industrial applications that require materials to withstand extreme temperatures.
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Article
21 sectionsContents
- History
- Characteristics
- Isotopes
- Compounds
- Halides and oxyhalides
- Oxides and sulfides
- Other compounds
- Organorhenium compounds
- Nonahydridorhenate
- Analytical chemistry of rhenium
- Occurrence
- Production
- Applications
- Alloys
- Catalysts
- Other uses
- Precautions
- Notes
- References
- Further reading
- External links
Rhenium is a chemical element; it has symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. It has one of the highest melting and boiling points of any element. It resembles manganese and technetium chemically and is mainly obtained as a by-product of the extraction and refinement of molybdenum and copper ores. It shows in its compounds a wide variety of oxidation states ranging from −3 to +7.
Rhenium was originally discovered in 1908 by Masataka Ogawa, but he mistakenly assigned it as element 43 (now known as technetium) rather than element 75 and named it nipponium. It was rediscovered in 1925 by Walter Noddack, Ida Tacke and Otto Berg, who gave it its present name. It was named after the river Rhine in Europe, from which the earliest samples had been obtained and worked commercially.