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radium b
释义
WordReference Random House Unabridged Dictionary of American English © 2024
radium B,
[
Chem.
]
Chemistry
an isotope of lead, formed by decay of radium A, that gives rise to radium C, which is an isotope of bismuth, from which radium D, radium E, and radium F, or polonium 210, are derived.
1900–05
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f-
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f1 layer
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