Nuclei questions
336 published questions with worked solutions.
- The activity of a radioactive material is 6.4 10^ -4 curie. Its half life is 5 days. The activity will become 5 10^ -6 curie after
- What is the half-life period of a radioactive material if its activity drops to 1/16th of its initial value in 30 years?
- A radioactive sample decays 7/8 times its original quantity in 15 minutes. The half life of the sample is
- The half life period of a radioactive substance is 60 days. The time taken for 7/8th of its orignal mass to disintegrate will be -
- A freshly prepared radioactive source of half life 2 hours 30 minutes emits radiation which is 64 times the permissible safe...
- Following statements related to radioactivity are given below: (a) Radioactivity is a random and spontaneous process and is...
- The Q-value of a nuclear reaction and kinetic energy of the projectile particle, K_p are related as :
- Read the following statements: (A) Volume of the nucleus is directly proportional to the mass number. (B) Volume of the nucleus...
- Two radioactive materials A and B have decay constants 25 and 16 respectively. If initially they have the same number of nuclei,...
- The half life of a radioactive substance is 5 years. After x years, a given sample of the radioactive substance gets reduced to...
- The activity of a radioactive material is 2.56 10^ -3 Ci. If the half life of the material is 5 days, after how many days the...
- A radio active material is reduced to 1 8 original amount in 3 days. If 8 10^ -3 kg of the material is left after 5 days the...
- For a nucleus ^A_ZX having mass number A and atomic number Z A. The surface energy per nucleon (b_s) = -a_1A^ 2/3 B. The Coulomb...
- A nucleus with mass number 242 and binding energy per nucleon as 7.6 MeV breaks into two fragment each with mass number 121. If...
- The half life of a radioactive substance is T. The time taken, for disintegrating 7 8 th part of its original mass will be:
- The decay constant for a radioactive nuclide is 1.5 10^ -5 s^ -1 . Atomic weight of the substance is 60 g mole^ -1 , (N_A = 6 10^...
- A nucleus disintegrates into two nuclear parts, in such a way that ratio of their sizes is 1 : 2^ 1/3 . Their respective speed...
- Two radioactive elements A and B initially have same number of atoms. The half life of A is same as the average life of B. If _A...
- A common example of alpha decay is ^ 238 _ 92 U ^ 234 _ 90 Th+_2He^4+Q Given: ^ 238 _ 92 U=238.05060u ^ 234 _ 90 Th=234.04360u...
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : The binding...
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