Nuclei questions
336 published questions with worked solutions.
- During mean life of a radioactive element, the fraction that disintegrates is
- Two radioactive substance A and B have decay constants 5 and respectively. At t=0 they have the same number of nuclei. The ratio...
- Statement 1: Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion Statement 2: For heavy nuclei,...
- Two radioactive materials X_1 and X_2 have decay constants 5 and respectively. If initially they have the same number of nuclei,...
- In the process of nucleus fission of 1 g uranium, the mass lost is 0.90 milligram. The efficiency of power station run by it is...
- The binding energy per nucleon for _1H^2 and _2He^4 are 1.1 MeV and 7.1 MeV respectively. The energy released when two _1H^2 to...
- A material found within the body of an organism trapped in an ice berg had a _6C^ 14 activity of about 0.144 Bq per g. _6C^ 14...
- Binding energy per nucleon for C^ 12 is 7.68 MeV and that for C^ 13 is 7.47 MeV. The energy required to remove a neutron from C^...
- When a deuteron of atomic mass 2.0147 amu and negligible kinetic energy is absorbed by a Li^6 nucleus of mass 6.0169 amu, the...
- The nuclear force
- The half-life of a radioactive substance is 20 min. The time taken between 50% decay and 87.5% decay of the substance will be
- The fraction of atoms of radioactive element that decays in 6 days is 7/8. The fraction that decays in 10 days will be
- The radioactivity of a sample is I_1 at a time t_1 and I_2 at a time t_2. If the half-life of the sample is _ 1/2 , then the...
- A radioactive sample S_1 having the activity A_1 has twice the number of nuclei as another sample S_2 of activity A_2. If A_2 =...
- A radioactive material decays by simultaneous emission of two particles with half-lives 1620 yr and 810 yr, respectively. The...
- Number of nuclei of a radioactive substance at time t = 0 are 2000 and 1800 at time = 2 s. Number of nuclei left after t = 6 s is
- A radioactive isotope has a half-life of 2 yr. How long will it take the activity to reduce to 3% of its original value?
- At time t = 0, a radioactive sample has mass of 10 g. Calculate the expected mass (in g) of radioactive sample after two...
- Two radioactive materials X_1 and X_2 have decay constants 5 and , respectively. If initially they have the same number of...
- Activity of a radioactive sample decreases to (1/3)rd of its original value in 3 days. Then, in 9 days its activity will become
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