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The rate of radioactive decomposition co...

The rate of radioactive decomposition corresponding to `3.7 xx 10^(10)` disintegration per second is called a curie. What weight of `""^(225)Ra`, whose `t_((1)/(2))=1620` yr, will be required to yield 1 millicurie of radiation?

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`1 xx 10^(-3)g`
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RC MUKHERJEE-ATOMIC STRUCTURE AND RADIOACTIVITY-PROBLEMS (Answers bracketed with questions)
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