Darmstadtium

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Darmstadtium (Listeni /dɑrmˈʃtætiəm/ darm-SHTAT-ee-əm) is a chemical element with the symbol Ds and atomic number 110. It is placed as the heaviest member of group 10 but a sufficiently stable isotope is not known which would allow chemical experiments to confirm its place. This synthetic element is one of the so-called super-heavy atoms and was first synthesized in 1994. The longest-lived and heaviest isotope known is 281aDs with a half-life of ~10 s although a possible nuclear isomer, 281bDs has an unconfirmed half-life of about 4 minutes.

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