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Isotopes of lawrencium
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<p><a href="/facts/Lawrencium/HVw2LVlx">Lawrencium</a> (103Lr) 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 258Lr in 1961. There are fourteen known isotopes from 251Lr to 266Lr, except 263Lr and 265Lr, and seven <a href="/facts/Nuclear_isomer/L8DHcqnk">isomers</a>. The longest-lived known isotope is 266Lr with a <a href="/facts/Half-life/kGVH8BAB">half-life</a> of 11 hours. </p>