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理学
放射性元素
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neptunium
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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。
Astronomy
全称:neptunium。缩写:Np
镎
Chemistry
>放射化学与辐射化学>放射性元素化学>释义
neptunium
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