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The nuclei of two radioactive isotopes of same substance one of mass number 236 and other of mass number 234 are present in the ratio 4:1 in an ore obtained from other planet. Their half-lives are 30 and 60 minutes respectively. Both isotopes are alpha ray emitters and activity of isotope of mass number 236 is 1 Rutherford (10^6 DPS) then find 1) After how much time their activities will become identical and 2) The time required to bring the ratio of their atom is 1:1 (answers are 180 minutes and 120 minutes) please give me the explanation....

The nuclei of two radioactive isotopes of same substance one of mass number 236 and other of mass number 234 are present in the ratio 4:1 in an ore obtained from other planet. Their half-lives are 30 and 60 minutes respectively. Both isotopes are alpha ray emitters and activity of isotope of mass number 236 is 1 Rutherford (10^6 DPS) then find 1) After how much time their activities will become identical and 2) The time required to bring the ratio of their atom is 1:1 (answers are 180 minutes and 120 minutes) please give me the explanation....

Grade:9

1 Answers

Avni Chauhan
askIITians Faculty 247 Points
5 years ago
572-1186_jai 4.PNG

Simillarly in equation 1 put N1= N2
and move forward in a similar manner

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