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理学
放射性元素
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seaborgium
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人工放射性元素,元素符号Sg,原子序数106,半衰期最长的同位素的质量数271。属周期系ⅥB族。以著名化学家G.T.西博格[注]的名字而命名。
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unstable separatrix
unstable slope
unstable solution
unstable spectrum
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unstable state kinetics
unstable submanifold
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unstable theory
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