Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. It does not occur naturally on Earth and is produced artificially. Theoretical research establishes dubniam as a member of group 5 in the 6d series of transition metals, placing it under vanadium, niobium, and tantalum.
About Dubnium in brief
Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. Dubnium does not occur naturally on Earth and is produced artificially. The element was formally named dubnium in 1997 after the town of Dubna, the site of the JINR. Theoretical research establishes dubniam as a member of group 5 in the 6d series of transition metals, placing it under vanadium, niobium, and tantalum. The information available to physicists aiming to synthesize one of the heaviest elements is thus far the only way to find out more about the element. The most stable known isotope has a half-life of about 28 hours, which greatly limits the extent of research on dubNium. The heaviest atomic nuclei are created in nuclear reactions that combine two other nuclei of unequal size into one; roughly, the more unequal the two nuclei in terms of mass, the greater the possibility that the two react. The material made of the heavier nuclei is made into a target, which is then bombarded by the beam of lighter nuclei. To lose its excitation energy and reach a more stable state, a compound nucleus either fissions or ejects one or several neutrons, which carry away the energy. The nucleus is recorded again once its decay is registered, and the location, the energy and the time of the decay are measured. Spontaneous fission of a nucleus can be determined arithmetically, however, so the original product cannot be determined from the daughters of the original nuclide.
Often, data provided by a new element could not have been caused by a different nuClide than the claimed one, and could not be considered to be caused by the new element at all. The original product of a fission reaction is not known, and physicists have not been able to conclude that it was indeed caused by this new element and that it is not the same as the one claimed by the Soviet Joint Institute for Nuclear Research (JINR) or the U.S. Lawrence Berkeley Laboratory (LBL) claimed the first discovery of the element in 1968. The long-standing dispute was resolved in 1993 by an official investigation of the discovery claims by the Transfermium Working Group, formed by the International Union of Pure and Applied Chemistry and the InternationalUnion of Pure & Applied Physics (IUPAP) The element has a dominant +5 oxidation state, with the other group 5 elements, with a few anomalies due to relativistic effects. It has a valence electron configuration, such as its valence electrons configuration and having a dominant -4 oxidation state. It often behaves more like niobiam rather than tantalum, breaking periodic trends. The exact location of the upcoming impact on the detector is marked; also marked are its energy and time of its arrival. In order to be detected, the nucleus must survive this long. In the separator, the newly produced nucleus is separated from other nuclides and transferred to a surface-barrier detector, which stops the nucleus.
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This page is based on the article Dubnium published in Wikipedia (as of Dec. 03, 2020) and was automatically summarized using artificial intelligence.
