Hassium

Hassium (eka-osmium) is a chemical element in the periodic table that has the symbol Hs and atomic number 108.

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It is a synthetic element whose most stable isotope is Hs-265, with a half-life of 2 ms.

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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.

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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.

Chemical element: A chemical element, often called simply element, is the class of atoms which contain the same number of protons....

Periodic table: The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements. First created by Dmitri Mendeleev, the elements are arranged by electron configuration so that many chemical properties follow a regular pattern across the tabl...

Atomic number: The atomic number (Z) is a term used in chemistry and physics to represent the number of protons found in the nucleus of an atom. In an atom of neutral charge, the number of electrons typically equals the atomic number....