Talk:Ununseptium
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In April of 2010, a team of Physicists from the Joint Institute for Nuclear Research in Dubna, Russia reported finding evidence of element number 117.[1] They used a target of 22 milligrams of berkelium-249, element 97, obtained from Oakridge National Laboratory and used a beam of Calcium ions to bombard it.
They produced evidence for two different isotopes of element 117, one with atomic weight of 293 (117 protons and 176 neutrons) which had a half-life of 14 milliseconds and the other with weight of 294, with half-life of 78 milliseconds.
The element is not yet officially named.
- ↑ Superheavy element 117 makes debut International team fills gap in the periodic table, by Alexandra Witze, Web edition : Tuesday, April 6th, 2010, accessed 7 April 2010.
