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理学
放射性元素
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technetium
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人工放射性元素,元素符号为Tc,原子序数43,原子量98.906,属周期系ⅦB族。
Astronomy
全称:technetium。缩写:Tc
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Chemistry
>放射化学与辐射化学>放射性元素化学>释义
technetium
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radiation efficiency
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radiation entropy
radiation environment
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radiation environmental impact assessment
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radiation equilibrium
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radiation exchange factor
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