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neptunium
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放射性元素
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人工放射性元素,元素符号Np,原子序数93,半衰期最长的同位素的质量数237。属周期系ⅢB族,锕系元素。仿照以天王星命名铀的方法,以天王星外面的海王星(Neptune)命名镎。
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>放射化学与辐射化学>放射性元素化学>释义
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