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放射性元素
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hassium
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人工放射性元素,元素符号Hs,原子序数108,半衰期最长的同位素的质量数269。属周期系Ⅷ族。以合成和发现该元素的德国重离子研究中心所在的黑森(Hessen)州命名。曾被称为108号元素(unniloctium),符号Uno。
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