The energy liberated when one atom of U-235 undergoes fission reaction is________________?
Correct answer: A. 200MeV
- A. 200MeV
- B. 40MeV
- C. 30MeV
- D. 20MeV
Explanation
Fission of one uranium-235 nucleus releases approximately 200 MeV, which is 200 x 1.602 x 10^-13 J = 3.20 x 10^-11 J per nucleus. The likely mistake is 20 MeV, which is about one-tenth of the typical energy released in a U-235 fission event.
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About Composition of Atomic Nuclei
Atomic nuclei contain positively charged protons and electrically neutral neutrons, collectively called nucleons. Questions use atomic number, mass number and nuclear notation to identify isotopes, isobars and isotones, and may connect nuclear composition with nuclear charge, mass defect, binding energy and the stability of the nucleus.
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