noun
EXAMPLES FROM CORPUS
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Children with more than 60 becquerels of radioactivity per kilo of bodyweight are thought to be at risk from disease.
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It had a caesium 137 concentration of only 4 becquerels per kilogram.
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One becquerel is equal to one radioactive decay per second.
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Readings showed levels of 56,000 becquerels per kilogram in vegetation and soil samples.