The decay constant of _88^226 Ra is 1.37 times 10^-11 sec^-1. A sample – InterviewSolution

1.	The decay constant of _88^226 Ra is 1.37 times 10^-11 sec^-1. A sample of _88^226 Ra having an activity of 1.5 millicurie will contain ….atoms. The blank can be correctly filled by,
Answer» `4.05 TIMES 10^18` `3.7 times 10^17` `2.05 times 10^15` `4.7 times 10^10` ANSWER :A

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