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Isotopes of nobelium
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<p><a href="/facts/Nobelium/syRkloSw">Nobelium</a> (102No) 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 (and correctly identified) was 254No in 1966. There are fourteen known <a href="/facts/Radioisotope/5WpCfbdq">radioisotopes</a>, which are 248No to 260No and 262No, and many <a href="/facts/Nuclear_isomer/L8DHcqnk">isomers</a>. The longest-lived isotope is 259No with a <a href="/facts/Half-life/kGVH8BAB">half-life</a> of 58 minutes. The longest-lived isomer is 251m1No with a half-life of 1.02 seconds. </p>