Which type of nuclear process results in a lower mass nuclei than the reactants? Chemistry Nuclear Chemistry Nuclear Chemistry 1 Answer Oscar L. May 18, 2018 Fission Explanation: In nuclear fission, #U-235# absorbs a neutron and becomes #U-236#. This is unstable and it breaks up in to two daughter nuclei and maybe two, three or four neutrons. Answer link Related questions What are radioactive isotopes? What is the PUREX liquid-liquid extraction? What is the difference between fission and fusion? What does nuclear chemistry involve? What is radiotherapy? Why is the study of radioactivity labeled nuclear chemistry? When an atom emits radiation, #"A."# a new element is always formed #"B."# the mass number of... How was the nucleus of an atom discovered? Question #4e0c6 Question #84861 See all questions in Nuclear Chemistry Impact of this question 2072 views around the world You can reuse this answer Creative Commons License