Dubnium 105 Db [262]   Switch element to... actinium aluminium aluminum americium antimony argon arsenic astatine barium berkelium beryllium bismuth bohrium boron bromine cadmium caesium calcium californium carbon cerium cesium chlorine chromium cobalt copper curium darmstadtium dubnium dysprosium einsteinium erbium europium fermium fluorine francium gadolinium gallium germanium gold hafnium hassium helium holmium hydrogen indium iodine iridium iron krypton lanthanum lawrencium lead lithium lutetium magnesium manganese meitnerium mendelevium mercury molybdenum neodymium neon neptunium nickel niobium nitrogen nobelium osmium oxygen palladium phosphorus platinum plutonium polonium potassium praseodymium promethium protactinium radium radon rhenium rhodium roentgenium rubidium ruthenium rutherfordium samarium scandium seaborgium selenium silicon silver sodium strontium sulfur sulphur tantalum technetium tellurium terbium thallium thorium thulium tin titanium tungsten ununbium ununhexium ununoctium ununpentium ununquadium ununtrium uranium vanadium xenon ytterbium yttrium zinc zirconium Go adjacent... Hf Ta W Rf Db Sg

The essentials

Description 

Here is a brief description of dubnium.

• Standard state: presumably a solid at 298 K
• Colour: unknown, but probably metallic and silvery white or grey in appearance
• Classification: Metallic
• Availability:

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

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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