Dubnium
Dubnium is a chemical element with the symbol Db and atomic number 105, named after the town of Dubna in Russia, where it was first produced. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, dubnium-268, has a half-life of approximately 28 hours.
In the periodic table of the elements, it is a d-block element and in the transactinide elements. It is a member of the 7th period and belongs to the group 5 element. Chemistry experiments have confirmed that dubnium behaves as the heavier homologue to tantalum in group 5. The chemical properties of dubnium are characterized only partly. They are similar with those of other group 5 elements.
In the 1960s, microscopic amounts of dubnium were produced in laboratories in the former Soviet Union and in California. The priority of the discovery and therefore the naming of the element was disputed between Soviet and American scientists, and it was not until 1997 that International Union of Pure and Applied Chemistry (IUPAC) established dubnium as the official name for the element.
Discovery of Dubnium
Credit for the discovery of dubinium in 1967 is shared between teams of scientists at the Joint Institute for Nuclear Research at Dubna, Russia and scientists at Lawrence Berkeley National Laboratory, California.
The element was named after the research facility in Russia where it was synthesized.
Appearance and Characteristics
Harmful effects:
Dubnium is harmful due to its radioactivity.
Characteristics:
- Dubnium is a radioactive synthetic metal and has only been produced in tiny amounts.
Uses of Dubnium
- Dubnium is of research interest only.
