[美国《新科学家》1994年8月13日报道] 物理学家也许不久就能发现“超重”元素,这种元素的原子序数大于112,其原子核相当稳定。目前已知的最重元素是迈特纳(Mt),它的原子序数是109,不过俄美物理学家小组已增大了发现新的“超重”元素的希望。他们已发现了重元素西博格(Sg),即106号元素的一些重同位素,而且发现他们存活比预计的要长得多。 [New Scientist, USA, August 13, 1994] Physicists may soon find “overweight” elements with atomic numbers greater than 112 and fairly stable nuclei. The heaviest element known so far is Mt. It has an atomic number of 109, although the Russian-American physicist panel has increased its hope of finding new “overweight” elements. They have found the heavy element Sg, some heavy isotope of the 106 element, and found that they survived more than expected.