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Isotopes of bohrium
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<p><a href="/facts/Bohrium/epvp3GWM">Bohrium</a> (107Bh) is an <a href="/facts/Artificial_element/azU9Nr1m">artificial element</a>. Like all artificial elements, it has no <a href="/facts/Stable_isotope/vgcdxgjA">stable isotopes</a>, and a <a href="/facts/Standard_atomic_weight/8arqbQsq">standard atomic weight</a> cannot be given. The first <a href="/facts/Isotope/KD9B1y6o">isotope</a> to be synthesized was 262Bh in 1981. There are 11 known isotopes ranging from 260Bh to 274Bh, and 1 <a href="/facts/Nuclear_isomer/L8DHcqnk">isomer</a>, 262mBh. The longest-lived isotope is 270Bh with a <a href="/facts/Half-life/kGVH8BAB">half-life</a> of 2.4 minutes, although the unconfirmed 278Bh may have an even longer half-life of about 690 seconds. </p>