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History and Discovery. Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. Uses of Dubnium. Scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, first reported the production of dubnium in 1967. Characteristics: Dubnium is a transactinide or super-heavy element. This greatly limits the extent of research on dubnium. Skip to page content; Skip to site menu on this page. It is a radioactive synthetic metal and has only been produced in tiny amounts. Atomic properties of dubnium. Uses of Dubnium. It is highly radioactive and unstable element. Feb 19, 2018 - - Dubnium Kitchen - Counter Found in TSR Category 'Sims 4 Counters' Dubnium is of research interest only. The atomic mass of an element is determined by the total mass of neutrons and protons that can be found in a single atom belonging to this element. Abundance earth’s crust: nil It is a radioactive element, and not found in any naturally occurring states. Dubnium was named after the town in the Soviet Union where a team of researchers first synthesized a sample. Dubnium is too rare to have any commercial or industrial application. They bombarded atoms of americium-243 with ions of neon-22, forming atoms of dubnium-260 and five free neutrons and atoms of dubnium-261 and four free neutrons. Dubnium is a member of the d-block series and is a transactinide element. Dubnium is harmful due to its radioactivity. As for the position to find dubnium within the periodic table of elements, dubnium is in group 5 and period 7. Abundance and Isotopes. Dubnium is a highly radioactive metal. Dubnium is highly radioactive: the most stable known isotope, dubnium-268, has a half-life of about 28 hours. Dubnium (Db), an artificially produced radioactive transuranium element in Group Vb of the periodic table, atomic number 105. The discovery of dubnium (element 105), like that of rutherfordium (element 104), has been a matter of dispute between Soviet and American scientists. Dubnium does not occur naturally on … Comprehensive data on the chemical element Dubnium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Dubnium. Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. Dubnium is a synthetic element that was discovered in 1970. Introduction; Discovery Dubnium is a chemical element discovered by Albert Ghiorso in the year 1970. Contents. Since Dubnium is not produced in high amounts and it … It has never been found naturally and only a small number of atoms have been produced in laboratories. This greatly limits the extent of research on dubnium. Periodic Table of Elements Element Dubnium - Db. Dubnium has an atomic mass of 262 u. Dubnium is highly radioactive: the most stable known isotope, dubnium-268, has a half-life of about 28 hours. Dubnium atoms have 105 electrons and the shell structure is 2.8.18.32.32.11.2. Its chemistry and appearance are not known with any certainty, although the chemistry is believed to be similar to tantalum. In 1970, a group of scientists working at the Lawrence Radiation Laboratory, now known as the … Dubnium is an artificial element and was first created and thus found in a laboratory in the city of Dubna. Dubnium was synthesized for the first time by team of scientist working at the Joint Institute for Nuclear Research (JINR), Dubna, Russia in 1968 and later the scientists of American Lawrence Berkeley Laboratory (LBL) announced the discovery of element-105 in 1970. It has an atomic number of 105 with a symbol Db, and it belongs to the 7th period of the 5th group of the periodic table. 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