Hassium
From Free net encyclopedia
Template:Elementbox header Template:Elementbox series Template:Elementbox groupperiodblock Template:Elementbox appearance Template:Elementbox atomicmass gpm Template:Elementbox econfig Template:Elementbox epershell Template:Elementbox phase Template:Elementbox cas number Template:Elementbox footer
Hassium (eka-osmium) is a chemical element in the periodic table that has the symbol Hs and atomic number 108. It is a synthetic element whose most stable isotope is Hs-269, with a half-life of 9.7 seconds.
History
It was first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried Münzenberg at the Institute for Heavy Ion Research at Darmstadt. The name hassium was proposed by them, derived from the Latin name for the German state of Hessen where the institute is located.
There was an element naming controversy as to what the elements from 101 to 109 were to be called; thus IUPAC adopted unniloctium (symbol Uno) as a temporary, systematic element name for this element. In 1994 a committee of IUPAC recommended that element 108 be named hahnium. The name hassium was adopted internationally, however, in 1997.
External links
ca:Hassi cs:Hassium de:Hassium et:Hassium es:Hassio eo:Hasio fr:Hassium ko:하슘 it:Hassio ku:Hassiyûm la:Hassium lt:Hasis nl:Hassium ja:ハッシウム nn:Hassium pl:Hass pt:Hássio ru:Хассий sr:Хасијум fi:Hassium sv:Hassium th:แฮสเซียม uk:Гасій zh:𨭆