A) 20 cc
B) 40 cc
C) 60 cc
D) 80 cc
Correct Answer: D
Solution :
After three half-lives, the number of nuclei should be \[{{N}_{3}}={{N}_{i}}{{\left( \frac{1}{2} \right)}^{3}}\]. Since \[R\propto N\] we have, \[{{R}_{3}}=\frac{R}{10}\] makes \[{{N}_{i}}=80cc\].You need to login to perform this action.
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