Hassium

Bohrium - Hassium - Meitnerium

Os
Hs

Full table

Known properties

Name, Symbol, Number Hassium, Hs, 108

Chemical series Transition metals

Group, Period, Block 8, 7 , d

Appearance unknown; probably metallic,
silvery white or gray

Atomic weight [269] amu

Electron configuration probably [Rn] 5f¹⁴ 6d⁶ 7s²
a guess based osmium

e^- 's per energy level 2, 8, 18, 32, 32, 14, 2

State of matter Presumably a solid

Hassium 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-265, with a half-life of 2 ms.

History

It was first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried M�nzenberg 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 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.

Hassium

History

External links