Bohrium 107 Bh [264]   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... W Re Os Sg Bh Hs

The essentials

Description 

Here is a brief description of bohrium.

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

Bohrium is a synthetic element that is not present in the environment at all. The German discoverers at GSI proposed the name Nielsbohrium (symbol Ns) after Niels Bohr. IUPAC are happy to name an element after Bohr but suggest bohrium (Bh) on the grounds that the first name of a person does not appear in the names of any other element named after a person. This seems to have been accepted by all concerned.

Isolation

Only a few atoms of element 107, bohrium, have ever been made. The first atoms were made through a nuclear reaction involving fusion of an isotope of lead, ²⁰⁹Pb, with one of chromium, ⁵⁴Cr.

²⁰⁹Pb + ⁵⁴Cr → ²⁶²Bh + ¹n

Isolation of an observable quantity of bohrium has never been achieved, and may well never be. This is because bohrium decays very rapidly through the emission of α-particles.

More recently, other isotopes have been made at the Paul Scherrer Institute (PSI) in Switzerland.

²⁴⁹Bk + ²²Ne → ²⁶⁶Bh + 5¹n

²⁴⁹Bk + ²²Ne → ²⁶⁷Bh + 4¹n

In this work, it appears the scientists concerned feel bohrium forms the oxychloride BhClO₃.

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