Nuclei questions
336 published questions with worked solutions.
- The half life of a radioactive isotope 'X' is 50 years. It decays to another element 'Y' which is stable. The two elements 'X'...
- The power obtained in a reactor using U ^ 235 disintegration is 1000 kW. The mass decay of U ^ 235 per hour is :
- A nucleus ^ m _ n X emits one -particle and two ^ - particles. The resulting nucleus is :
- The half life of a radioactive nucleus is 50 days. The time interval (t_2 - t_1) between the time t_2 when 2 3 of it has decayed...
- If the nuclear radius of ^ 27 Al is 3.6 Fermi, the approximate nuclear radius of ^ 64 Cu in Fermi is:
- A mixture consists of two radioactive materials A_1 and A_2 with half lives of 20 s and 10 s respectively. Initially the mixture...
- The half-life of a radioactive isotope X is 20 years. It decays to another element Y which is stable. The two elements X and Y...
- A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 u. The...
- The binding energy per nucleon of ^ 7 _ 3 Li and ^ 4 _ 2 He nuclei are 5.60 MeV and 7.06 MeV, respectively. In the nuclear...
- A radio isotope X with a half life 1.4 10^ 9 years decays of Y which is stable. A sample of the rock from a cave was found to...
- Radioactive material 'A' has decay constant '8 ' and material 'B' has decay constant ' '. Initially they have same number of...
- For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for...
- In the uranium radioactive series, the initial nucleus is ^ 238 _ 92 U and that the final nucleus is ^ 206 _ 82 Pb. When uranium...
- Half-lives of two radioactive elements A and B are 30 minute and 60 minute respectively. Initially the samples have equal number...
- Activity of a radioactive sample decrease to (1/3)rd of its original value in 3 days. Then in 9 days its activity reduce to
- The half life of a radioactive substance is 25 minutes. The time taken between 50% decay and 87.5% decay of the substance will be
- If 'T' is the half life of a radioactive substance then its instantaneous rate of change of activity is proportional to
- Two different radioactive elements with half lives 'T₁' and 'T₂' have undecayed atoms 'N₁' and 'N₂' respectively present at a...
- A radioactive has half-life of 5 years. The percentage of fraction decayed in 10 years will be
- An isotope of the original nucleus can be formed in a radioactive decay, with the emission of following particles
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