4.17 During nuclear explosion. one of the products is ir with hailf ide df28.1 years. If Iug of "Sr was absorbed in the bones of a newly borbaby instead of calcium, how much of it will remain after 10 years and60 years if it is not lost metabolically.4.18 For a first order reaction, show that time required for 99% completionis twice the time required for the completion of 90% of reaction.

4.17 During nuclear explosion. one of the products is ir with hailf id

1.	4.17 During nuclear explosion. one of the products is ir with hailf ide df28.1 years. If Iug of "Sr was absorbed in the bones of a newly borbaby instead of calcium, how much of it will remain after 10 years and60 years if it is not lost metabolically.4.18 For a first order reaction, show that time required for 99% completionis twice the time required for the completion of 90% of reaction.
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