Definitions for dubnium
dub·ni·um

Princeton's WordNetRate this definition:0.0 / 0 votes

1. dubnium, Db, hahnium, element 105, atomic number 105noun

   a transuranic element

WiktionaryRate this definition:0.0 / 0 votes

1. dubniumnoun

   A transuranic chemical element (symbol Db) with atomic number 105.

2. Etymology: Named after Dubna in Russia

WikipediaRate this definition:0.0 / 0 votes

1. Dubnium

   Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. It is highly radioactive: the most stable known isotope, dubnium-268, has a half-life of about 16 hours. This greatly limits extended research on the element. Dubnium does not occur naturally on Earth and is produced artificially. The Soviet Joint Institute for Nuclear Research (JINR) claimed the first discovery of the element in 1968, followed by the American Lawrence Berkeley Laboratory in 1970. Both teams proposed their names for the new element and used them without formal approval. 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 International Union of Pure and Applied Physics, resulting in credit for the discovery being officially shared between both teams. The element was formally named dubnium in 1997 after the town of Dubna, the site of the JINR. Theoretical research establishes dubnium as a member of group 5 in the 6d series of transition metals, placing it under vanadium, niobium, and tantalum. Dubnium should share most properties, such as its valence electron configuration and having a dominant +5 oxidation state, with the other group 5 elements, with a few anomalies due to relativistic effects. A limited investigation of dubnium chemistry has confirmed this.

ChatGPTRate this definition:0.0 / 0 votes

1. dubnium

   Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. It is a transactinide element and a member of the 5th period in d-block of the periodic table. It is highly radioactive and unstable, with the most stable isotope, dubnium-268, having a half-life of just about a day. It is named after the Russian town of Dubna, where it was first discovered in 1967. As a synthetic element, Dubnium does not exist naturally and must be produced in a laboratory through nuclear reactions.

WikidataRate this definition:0.0 / 0 votes

1. 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 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 established dubnium as the official name for the element.

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1. • Element

How to pronounce dubnium?

1. Alex

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   David

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   Mark

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   Daniel

   British

   Libby

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   Mia

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   Karen

   Australian

   Hayley

   Australian

   Natasha

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   Neerja

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   Oliver

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How to say dubnium in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of dubnium in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of dubnium in Pythagorean Numerology is: 3

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=dubnium
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Dubnium
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Dubnium
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=dubnium