A) 2000
B) 3000
C) 4000
D) 5000
Correct Answer: D
Solution :
\[n=\frac{24}{24\times 138.6}=\frac{1}{138.6};\] Now\[\frac{N}{{{N}_{0}}}={{\left( \frac{1}{2} \right)}^{n}}={{\left( \frac{1}{2} \right)}^{1/138.6}}\] \[\Rightarrow N=10,00000{{\left( \frac{1}{2} \right)}^{1/138.6}}=995011\] So number of disintegration \[=1000000-995011=4989\approx 5000\].You need to login to perform this action.
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