Isotopes of seaborgium

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Seaborgium (106Sg) is a synthetic element and so has no stable isotopes. A standard atomic weight cannot be given. The first isotope to be synthesized was 263Sg in 1974. There are fourteen known radioisotopes from 257Sg to 271Sg (except 270Sg) and five known isomers (259mSg, 261mSg, 263mSg, 265mSg, and 267mSg).

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