During a nuclear explosion, one product is ⁹⁰Sr… | Nuclear Physics | JEE Main 2020

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JEE MAIN 2020

07-01-20 S1

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During the nuclear explosion, one of the products is ${ }^{90} \mathrm{Sr}$ with half life of 6.93 years. If $1 \mu \mathrm{~g}$ of ${ }^{90} \mathrm{Sr}$ was absorbed in the bones of a newly born baby in place of Ca , how much time, in years, is required to reduce it by $90 \%$ if it is not lost metabolically

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