Hassium definition

häsē-əm
An artificially produced radioactive element with atomic number 108 that has known isotopes with mass numbers ranging from 263 to 277, all of which decay by alpha particle emission or spontaneous fission. The isotope with the longest confirmed half-life (16.5 minutes) is Hs-277.
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A radioactive chemical element with a very short half-life: a transactinide produced by bombarding lead with high-energy nuclear particles: symbol, Hs: at. no. 108
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A synthetic, radioactive element that is produced by bombarding lead with iron ions. Its known isotopes have mass numbers ranging from 263 to 277. Hs 277 has the longest confirmed half-life (16.5 minutes). Atomic number 108.
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An artificially-produced transuranic chemical element (symbol Hs) with atomic number 108.
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(physics) A doubly magic isotope of hassium - 270108Hs; it is the longest-lived one known, having a half-life of several seconds.
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Origin of hassium

  • From Medieval Latin Hassia Hesse (German state containing Darmstadt, where the element was first synthesized)

    From American Heritage Dictionary of the English Language, 5th Edition

  • From the Latin form of the German state of Hessen, the location of the institute where the element was first synthesized.

    From Wiktionary