The discovery history of Rhenium
Di Mendeleev predicted the existence of two analogues of manganese from
the periodic method he discovered in 1869, which he called "ekaman" and
"DWI manganese". They correspond to the currently known 43 elements tech
and 75 en.
Over the next 50 years, many researchers reported the discovery of
manganese analogues. They use S. Kern (1877), Herman (1846), barius
(1894), n (Ogawa, 1908), giyar (1869) and some of them may correspond to
element 75 -.
Thus, for example, one possible precursor of dev is dev, which was
discovered in 1857 by Russian chemist CERN Kern in the remains of the
discovery of platinum ores.
But none of them is element 43. Now we know that searching for this
element in natural compounds is usually futile because it is unstable.
Element 43 was artificially obtained by E. cegpe and C. perier by
bombarding molybdenum nucleus with deuteron in 1937. Because it was the
first element obtained by artificial technique, it was named ((symbol TC).
In 1922, German geochemists v. and I. noddak began to search
systematically for manganese analogues. Based on the location of the
elements in the crust, they believe that elements 43 and 75, as well as
minerals containing both molybdenum and ruthenium or tungsten, are most
likely to be found in natural platinum. These minerals include, for
example, Columbian and tantalite. 0.2 g of molybdenum, tungsten,
ruthenium and other elements were isolated from 1 kg of columbit of V.
and I. noddak. A new element was indeed found in the product, which was
confirmed by the study of characteristic X-ray spectra. 5. And I. noddak
reported their findings in June 1925. RH names them elements. A few
months later, Czech scientists I. druce and F. L ü hring and J.
Heyrovsky and V. dolejzek reported the name of element 75 found in
pyrolusite.
Subsequently, it was found that the content of that was the highest in
molybdenum minerals.
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