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Reference.org
Isotopes of tennessine
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<p><a href="/facts/Tennessine/eGCBDvEr">Tennessine</a> (117Ts) is the most-recently synthesized <a href="/facts/Synthetic_element/azU9Nr1m">synthetic element</a>, and much of the data is hypothetical. As for any synthetic element, a <a href="/facts/Standard_atomic_weight/8arqbQsq">standard atomic weight</a> cannot be given. Like all synthetic elements, it has no <a href="/facts/Stable_isotope/vgcdxgjA">stable isotopes</a>. The first (and so far only) <a href="/facts/Isotope/KD9B1y6o">isotopes</a> to be synthesized were 293Ts and 294Ts in 2009. The longer-lived isotope is 294Ts with a <a href="/facts/Half-life/kGVH8BAB">half-life</a> of 51 ms. </p>