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atomic number 93
n.
a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium
同义词:
neptunium
Np
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atomic number 93
n.a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium 同义词:neptuniumNp
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