Hassium

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Hassium (Listeni /ˈhæsiəm/ HASS-ee-əm or /ˈhɑːsiəm/ HAH-see-əm)[1] is a synthetic element with the symbol Hs and atomic number 108. It is the heaviest member of the group 8 (VIII) elements. The element was first observed in 1984. Experiments have confirmed that hassium is a typical member of group 8 showing a stable +8 oxidation state, analogous to osmium.

Several isotopes are known, with 269Hs being the longest-lived with a half-life of ~10 s. More than 100 atoms of hassium have been synthesized to date in various cold and hot fusion reactions, both as a parent nucleus and decay product.

Contents

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Germanium
Timeline of chemical elements discoveries
Haloalkane
Magnesium
Iodine
Graphite
Isotope separation
Amino acid
Iridium
Polychlorinated biphenyl
Concentration
Natural gas
Carbon monoxide
Fertilizer
Boron
Solubility
Methanol
Adenosine triphosphate
Palladium
Catalysis