The half lives of two longest-lived radioactive isotopes of phosphorus `P^(32)` and `P^(33)`,
Channel: Doubtnut
Date: 2020-02-20

The half lives of two longest-lived radioactive isotopes of phosphorus `P^(32)` and `P^(33)`, are 14 days and 28 days respectively. A sample has been prepared by mxing the two isotopes in the ratio of 4:1 of their atoms. Initial activity of the mixed sample is 9.0mCi. Find the activity of the sample after 80 days. Take `ln2=0.7` and `e^(-2)=0.14`