Nuclei questions
336 published questions with worked solutions.
- Starting with a sample of pure ^ 66 Cu, 7/8 of it decays into Zn in 15 min. The corresponding half-life is
- Suppose we consider a large number of containers each containing initially 10000 atoms of a radioactive material with a half-life...
- A radioactive isotope X with half-life 1.5 10^9 yr decays into a stable nucleus Y. A rock sample contains both elements X and Y...
- Two radioactive substances A and B have decay constants 5 and , respectively. At t = 0, they have the same number of nuclei. The...
- If 10% of a radioactive material decays in 5 days, then the amount of original material left after 20 days is approximately
- The half-life of a radioactive isotope X is 20 yr. It decays to another element Y which is stable. The two elements X and Y were...
- In a radioactive material the activity at time t_1 is R_1 and at a later time t_2, it is R_2. If the decay constant of the...
- For the given reaction, the particle X is : _ 6 ^ 11 C _ 5 ^ 11 B + ^ + + X
- The relation between and T_ 1/2 is : (T_ 1/2 = half life, decay constant)
- Nuclear - Fission is best explained by :
- A 300 gram radioactive sample has half life of 3 hour's. After 18 hour's remaining quantity will be :
- Half life of radioactive element is 12.5 Hour and its quantity is 256 gm. After how much time its quantity will remain 1 gm : -
- Energy is released in nuclear fission is due to
- Which of the following are suitable for the fusion process :
- A sample of radioactive element containing 4 10^ 16 active nuclei. Half life of element is 10 days, then number of decayed nuclei...
- _ 92 U ^ 235 , nucleus absorb a neutron and disintegrate in _ 54 Xe ^ 139 , _ 38 Sr ^ 94 and x So, What will be the product x :
- Solar energy is mainly caused due to :
- The volume occupied by an atom is greater than the volume of the nucleus by a factor of about
- A sample of radioactive element has a mass of 10 gm at an instant t = 0. The approximate mass of this element in the sample after...
- The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of _2^4 He is (Given :...
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