Dubnium: the essentials

Dubnium is a synthetic element that is not present in the environment at all. It has no uses.

Table: basic information about and classifications of dubnium.

Dubnium: historical information

Dubnium was discovered by Workers at the Nuclear Institute at Dubna, and the University of California, Berkeley, USA. at 1967 in USSR, United States. Origin of name: the origin of the name dubnium is the Joint Nuclear Institute at Dubna", an institute heavily involved in the search for heavy elements.

Dubnium apparently was synthesized by Russian and American workers independently by bombardment technologies. Its actual isolation as the free element has not been accomplished. In 1967, Flerov reported element 105 after experiments at the Joint Research Institute in Russia involving reactions between 243Am ions with 22Ne ions. In 1970, Ghiorso and others announced their synthesis of dubnium at Berkeley (California) in the USA. This method involved the collsion of 249Cf ions with 15N ions.

Dubnium: physical properties

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Dubnium: orbital properties

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Isolation

Isolation: only very small amounts of of element 105, dubnium, have ever been made. The first samples were made through nuclear reactions involving fusion of an isotope of californium, 249Cf, with one of nitrogen, 14N. A second route to the same isotope via berkelium is also known

15N + 249Cf → 261105Db + 4 1n

16N + 249Bk → 261105Db + 4 1n

Isolation of an observable quantity of dubnium has never been achieved.

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dubnium atomic number