Ida Eva Noddack german chemist co-discovered element rhenium

Ida Eva Noddack – co-discoverer of rhenium

Article on Ida Eva Noddack

Biography & contributions

Ida Eva Noddack (Ida Noddack) was a German chemist and physicist born on February 25, 1896 – died on September 24, 1978. Ida Eva well noted for her discovery of rhenium chemical element.Ida Eva was awarded with Justus Leibig Medal in the year of 1931, Scheele Medal in the year of 1934. She was the first person to mention the possibility of uranium fission.

Tacke, Noddack, and Berg in 1925, they bombarded platinum and columbite ores with electrons, which collided with atomic nuclei that then, emitted X-rays. The atomic number of an element could thus be deduced from the spectrum of X-rays that the nuclei emitted. They announced the detection of the two predicted elements as masurium with atomic number 43, and rhenium with atomic number 75. The 43rd element masurium was named as technetium by Emilio Segre and Carlo Perrier.

Facts about rhenium

Rhenium is expensive silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Rhenium is having symbol Re, atomic number 75,atomic mass 186.2 g/mol, electron configuration [Xe] 4f14 5d5 6s2,density 21.02 g/cm3,melting point 3186 °C, boiling point 5596 °C.

It is also one of the densest, exceeded only by platinum, iridium and osmium. Rhenium has a hexagonal close-packed crystal structure. Rhenium in the form of rhenium-platinum alloy is used as catalyst for catalytic reforming, which is a chemical process to convert petroleum refinery naphthas with low octane ratings into high-octane liquid products.

Rhenium resembles manganese and technetium chemically and is obtained as a by-product of molybdenum and copper ore's extraction and refinement. Rhenium is most available commercially as salts of perrhenate, including sodium and ammonium perrhenates.

Rhenium is used in alloys for jet engines and in tungsten and molybdenum based alloys. It is widely used as filaments for mass spectrographs. Rhenium is also used as an electrical contact material. Rhenium catalysts are exceptionally resistant to poisoning from nitrogen, sulfur and phosphorous and are useful in the hydrogenation of fine chemicals.

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