Question

The half-life of ${ }^{226} {Ra}$ is $1602 \mathrm{~y}$. Calculate the activity of $0.1 \mathrm{~g}$ of ${RaCl}_2$ in which all the radium is in the form of ${ }^{226} {Ra}$. Taken atomic weight of ${Ra}$ to be $226 \mathrm{~g} \mathrm{~mol}^{-1}$ and that of ${Cl}$ to be $35.5 \mathrm{~g} \mathrm{~mol}^{-1}$.

Accepted Answer

$2.8 	imes 10^9$ disintegrations $\mathrm{s}^{-1}$

Answer

$8.2 	imes 10^9$ disintegrations $\mathrm{s}^{-1}$

Answer

$2.8 	imes 10^{13}$ disintegrations $\mathrm{s}^{-1}$

Answer

$8.2 	imes 10^9$ disintegrations $\mathrm{s}^{-1}$

JEE PHYSICS MCQ: NUCLEI

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