โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Dubnium
  • ๐Ÿ‡จ๐Ÿ‡ณ ๐จง€
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Dubnium
  • ๐Ÿ‡ซ๐Ÿ‡ท Dubnium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Dubnium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ื“ื•ื‘ื ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Dubnio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒ‰ใƒ–ใƒ‹ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Dubnium
  • ๐Ÿ‡ท๐Ÿ‡บ ะ”ัƒะฑะฝะธะน
  • ๐Ÿ‡ช๐Ÿ‡ธ Dubnio
  • ๐Ÿ‡ธ๐Ÿ‡ช Dubnium

Dubnium: the essentials

Dubnium atoms have 105 electrons and the shell structure is 2.8.18.32.32.11.2. The ground state electronic configuration of neutral dubnium is [Rn].5f14.6d3.7s2 (a guess based upon that of tantalum) and the term symbol of dubnium is 4F3/2 (a guess based upon guessed electronic structure).

Dubnium: description  

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

Dubnium: physical properties

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Dubnium: heat properties

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Dubnium: atom sizes

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Dubnium: electronegativities

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Dubnium: orbital properties

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Dubnium: abundances

More geological data...

Dubnium: crystal structure

Db crystal structure
The solid state structure of dubnium is: bcc (body-centred cubic).

More crystallographic data...

Dubnium: biological data

Dubnium has no biological role.

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Dubnium: uses

Uses...

Dubnium: reactions

Reactions of dubnium as the element with air, water, halogens, acids, and bases where known.

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Dubnium: binary compounds

Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of dubnium where known.

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Dubnium: compound properties

Bond strengths; lattice energies of dubnium halides, hydrides, oxides (where known); and reduction potentials where known.

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Dubnium: history

Dubnium was discovered by Workers at the Nuclear Institute at Dubna, and the University of California, Berkeley, USA. in 1967 at 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.

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Dubnium: isotopes

Isotope abundances of dubnium
Isotope abundances of dubnium with the most intense signal set to 100%.

More isotope and NMR data...

Dubnium: 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.