Nuclei questions
336 published questions with worked solutions.
- ^ 238 _ 92 A ^ 234 _ 90 B+^4_2D+Q In the given nuclear reaction, the approximate amount of energy released will be : [Given, mass...
- The half-life of a radioactive nucleus is 5 years. The fraction of the original sample that would decay in 15 years is :
- The energy released per fission of nucleus of ^ 240 X is 200 MeV. The energy released if all the atoms in 120 g of pure ^ 240 X...
- Consider the following radioactive decay process ^ 218 _ 84 A A_1 ^- A_2 A_3 A_4 ^+ A_5 A_6 The mass number and the atomic number...
- Assume that protons and neutrons have equal masses. Mass of a nucleon is 1.6 10^ -27 kg and radius of nucleus is 1.5 10^ -15 A^...
- A nucleus disintegrates into two smaller parts, which have their velocities in the ratio 3:2. The ratio of their nuclear sizes...
- If a radioactive element having half-life of 30 min. is undergoing beta decay, the fraction of radioactive element remains...
- A radioactive nucleus decays by two different process. The half life of the first process is 5 minutes and that of the second...
- In the options given below, let E denote the rest mass energy of a nucleus and n a neutron. The correct option is
- A radioactive sample S1 having an activity of 5 µCi has twice the number of nuclei as another sample S2 which has an activity of...
- If N_0 is the original mass of the substance of half- life period t_ 1/2 = 5 years, then the amount of substance left after 15...
- If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should
- When a U^ 238 nucleus originally at rest, decays by emitting an alpha particle having a speed ' u ', the recoil speed of the...
- A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 minutes, the rate is...
- A nucleus with Z = 92 emits the following in a sequence: , ^-, ^- , , , , , ^-, ^-, , ^+, ^+, . Then Z of the resulting nucleus is
- Which of the following cannot be emitted by radioactive substances during their decay?
- The binding energy per nucleon of deuteron ( _1^2H ) and helium nucleus ( _2^4He ) is 1.1MeV and 7MeV respectively. If two...
- The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to I 8 . The thickness...
- Starting with a sample of pure ^ 66 Cu, 7/8 of it decays into Zn in 15 minutes. The corresponding half-life is
- If radius of ^ 27 _ 13 Al nucleus is estimated to be 3.6 Fermi then the radius ^ 125 _ 52 Te nucleus be nearly
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