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Half life of 90Sr is 6.93 years. In a ch...

Half life of 90Sr is 6.93 years. In a child body 1g of 90Sr dopped in place of calcium, how many years will it take to reduce its concentration by 90% (Assume no involvement of Sr in metabolism)

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23.03 years
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JEE MAINS PREVIOUS YEAR-JEE MAIN-CHEMISTRY
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