Naming the Transactinides

An alternative route was followed by workers at LBNL in California, who used a cold fusion approach with a heavier projectile nucleus (krypton) and a lighter target (lead) bombardment over an eleven-day period afforded three atoms having a lifetime of less than a millisecond, believed to be element 118, though these claims must be regarded as unsubstantiated. 

Most recently, in February 2004, experiments were reported giving serious evidence for elements 113 and 115, again synthesized using Ca as the projectile  

These atoms all decayed (with lifetimes in the range 19-280 milliseconds) by a-decay to afford what are believed to be atoms of element 113  

These atoms of element 113 have longer lifetimes, one in excess of a second. 

An alternative route for synthesis of an atom of element 113 was reported by a team of Japanese (largely) and Chinese workers in October 2004  

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Elements with atomic numbers up to 112 (ununbium, discovered in 1996) have been prepared, and names have been agreed for elements up to 109 (meitnerium, named after Austrian physicist Lise Meitner). Elements 110, 111, and 112 have temporary names. The transactinide elements are unstable and have short half-lives. 

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