Last Updated
：2025/11/22
rutherford
（ plural ）
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An obsolete unit of radioactivity (symbol: rd), defined as the activity of a quantity of radioactive material in which one million nuclei decay per second.
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rutherford
The lab measured the sample's activity in rutherford to compare it with historical data, even though that unit is now obsolete.
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The lab measured the sample's activity in rutherford to compare it with historical data, even though that unit is now obsolete.
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