![]() ![]() The name would like, by its significance in Rumanian, rappeller a burning desire so that the moment comes where peace will end most odious wars than the history knew". The element had been identified for this period of atrocious suffering for humanity. We will decided to call it Dor (Do) this element. ![]() "Now that we have a quasi-certainty that our research and assertions of 1939, on natural elements of atomic number 85 are right, we want to propose a name for this box of the periodic system, that with the case or the confirmation of these experiments would be final and priority of our work officellement allowed. Moreover, he had to escape from the Nazi conquest of Paris, then he lost part of his equipment in the fire following the American bombardment of Bucharest on April 15, 1944. Hulubei soon announced the discovery but it required many years and hard work before he could complete the spectroscopic identification. 1939/44 Dor (Do): In 1939 Horia Hulubei (1896-1972) and Yvette Cauchois (1908-1999) observed unknown lines in the emission spectrum of radon, which they attributed to element 85.It is written that it is named after Dacia, the Roman province in Southeastern Europe, but, seen the discoverer, it is more likely that it is named after Dacca. Searching for a member of the Thorium radioactive family, the chemist Rajendralal De, in Dacca (India, nowadays Bangladesh), found two new elements, the first he named Dakin (Eka-Iodine), the other Gourium (note). Under this name element #85 figured in textbooks and reference works to 1947. They named it after the state of Alabama (note). Sommer, of the Alabama Polytechnic Institute (Auburn, Ala.) reported that he succeeded in obtaining 0,000002 grams of element #85 in monazite. The authors of the imaginary discoveries gave different names to it (note): Several times appeared reports about its discovery, however, since we know now that all isotopes of element #85 are highly radioactive, and the amount present in nature is very small, it is clear that these early reports must be erroneous.įrom 1925 through 1943 six reports were published on the discovery of element #85. Wagner drew again attention to the still hypothetical fifth member of the group of halogens, asserting that this element must be radioactive, the search was intensified. Especially after in 1920 the German chemist E. Therefore from the end of the 19th century searches were done for this element in different minerals. ![]() It was obvious that it must possess interesting properties: the activity of halogens, combined with metallic properties as its neighbour Polonium. The existence of element #85 was predicted by Д.И. The isotope 211At has a half life on only 8.3 hours. If one succeeds in producing the element, the instability is very clear. They have named the new element Astatine, from the Greek αστατος = restless, unstable, because the element has no stable isotopes and the suffix -ine because that is usual for halogens (note). They observed chemical behavior somewhat similar to that of other halogens. Mackenzie (1912-2002), and Emilio Segrè (1905-1989), who synthesized the isotope 211At by bombarding Bismuth with alpha particles. The element was first characterized in 1940 by Dale R. ![]()
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