Question

___ is the phenomenon of splitting up of a heavy nucleus, on bombardment with slow speed neutrons, into fragments of comparable mass, with the releasing of a large amount of energy.

• A. Nuclear fission
• B. Nuclear fusion
• C. Thermal fusion
• D. Radiation

Answer 1

The correct option is A

Nuclear fission

Nuclear fission is a process where a heavy nucleus splits into many lighter nuclei. Nuclear fission is accompanied by the release of a large amount of energy, both as, electromagnetic radiations and kinetic energy of resulting fragments. To achieve fission, the heavy nuclei of elements are bombarded with slow speed neutrons. The first nuclear fission was that of uranium-235.