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Isotopes of flerovium
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<p><a href="/facts/Flerovium/Aa7uGMuG">Flerovium</a> (114Fl) is a <a href="/facts/Synthetic_element/azU9Nr1m">synthetic element</a>, and thus 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 <a href="/facts/Isotope/KD9B1y6o">isotope</a> to be synthesized was 289Fl in 1999 (or possibly 1998). Flerovium has six known isotopes, along with the unconfirmed 290Fl, and possibly two <a href="/facts/Nuclear_isomer/L8DHcqnk">nuclear isomers</a>. The longest-lived isotope is 289Fl with a <a href="/facts/Half-life/kGVH8BAB">half-life</a> of 1.9 seconds, but 290Fl may have a longer half-life of 19 seconds. </p>