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The half life of ""(38) Sr^(90) isotope ...

The half life of `""_(38) Sr^(90)` isotope is 28 years. What is the rate of disintegration of 15 mg of this isotope? (Given Avogadro No `=6.023 xx 10^(23) )`

Text Solution

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`R= lambda N`
`N=1.004 xx 10^(20) `
`lambda = (0.693) /(T)`
`lambda = 7.848 xx 10^(-10) s^(-1)`
`R=7.879 xx 10^(10) Bq`
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