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A radioactive isotope X with a half-life of 1.37×10^9 years decays to Y which is stable. A sample of rock from the moon was found to contain both the elements X and Y which were in the ratio of 1:7. The age of the rock is.
17
Jun
A radioactive isotope X with a half-life of 1.37×10^9 years decays to Y which is stable. A sample of rock from the moon was found to contain both the elements X and Y which were in the ratio of 1:7. The age of the rock is. 90% of the active nuclei present in a radioactive [...]
Two radioactive substances A and B have half lives of T and 2T respectively. Samples of a and b contain equal number of nuclei initially. After a time 4T, the ratio of the number of undecayed nuclei of A to the number if undecayed nuclei of A to the number of undeacyed nuclei of B is
17
Jun
Two radioactive substances A and B have half lives of T and 2T respectively. Samples of a and b contain equal number of nuclei initially. After a time 4T, the ratio of the number of undecayed nuclei of A to the number if undecayed nuclei of A to the number of undeacyed nuclei of B [...]
90% of the active nuclei present in a radioactive sample are found to remain undecayed after 1 day. The percentage of undecayed nuclei left after two days will be
17
Jun
90% of the active nuclei present in a radioactive sample are found to remain undecayed after 1 day. The percentage of undecayed nuclei left after two days will be 90% of the active nuclei present in a radioactive sample are found to remain undecayed after 1 day. The percentage of undecayed nuclei left after two [...]
The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2(t2 > t1). If its mean life is T, then
17
Jun
The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2(t2 > t1). If its mean life is T, then The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2(t2 > t1). If its mean life is T then June [...]
The half-life of 215 At is 100 μs. The time taken for the radioactivity of sample of 215 At to decay to 1/16 th of its initial value is
17
Jun
The half-life of 215 At is 100 μs. The time taken for the radioactivity of sample of 215 At to decay to 1/16 th of its initial value is The half-life of 215 At is 100 μs. The time taken for the radioactivity of sample of 215 At to decay to 1/16 th of its [...]
The half- life of radioactive radon is 3.8 days. If the initial mass of radon is 150 mg the mass remaining undecayed after 38 days is
17
Jun
The half- life of radioactive radon is 3.8 days. If the initial mass of radon is 150 mg the mass remaining undecayed after 38 days is The half- life of radioactive radon is 3.8 days. If the initial mass of radon is 150 mg the mass remaining undecayed after 38 days is June 17, 2021 [...]
In a sample of radioactive material, what fraction of initial number of active nuclei will remain undistintegrated after half of a half-life of the sample?
17
Jun
In a sample of radioactive material, what fraction of initial number of active nuclei will remain undistintegrated after half of a half-life of the sample? In a sample of radioactive material what fraction of initial number of active nuclei will remain undistintegrated after half of a half-life of the sample? June 17, 2021 Category: Cengage [...]
A fraction f1 of a radioactive sample decays in one mean life and a fraction f2 decays in one half-life
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Jun
A fraction f1 of a radioactive sample decays in one mean life and a fraction f2 decays in one half-life A fraction f1 of a radioactive sample decays in one mean life and a fraction f2 decays in one half-life June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter 14 - Nuclear Physics [...]
Let T be the mean life of a radioactive sample. 75% of the active nuclei present in the sample initially will decay in time.
17
Jun
Let T be the mean life of a radioactive sample. 75% of the active nuclei present in the sample initially will decay in time. Let T be the mean life of a radioactive sample. 75% of the active nuclei present in the sample initially will decay in time. June 17, 2021 Category: Cengage NEET by [...]
Three fourth of the active decays in a radioactive sample decay in 3/4 sec. The half-life of the sample is
17
Jun
Three fourth of the active decays in a radioactive sample decay in 3/4 sec. The half-life of the sample is Three fourth of the active decays in a radioactive sample decay in 3/4 sec. The half-life of the sample is June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter 14 - Nuclear Physics [...]