108. Hassium
Name: Hassium
Symbol: Hs
Atomic Number: 108
Atomic Mass: (265.0) amu
Melting Point: Unknown
Boiling Point: Unknown
Number of Protons/Electrons: 108
Number of Neutrons: 157
Classification: Transition Metal
Crystal Structure: Unknown
Density(293 K): Unknown
Color: Unknown
Hassium, is a synthetic element that is not present in the environment at all, whose most stable isotope is Hs-265, with a half-life of 2 ms.
It was first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried Munzenberg 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.
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