The strong neutron excess (defined as N - Z) of high- mass nuclei is illustrated by noting that most high-mass nuclides could never fission into two stable nuclei without neutrons being left over. For example, consider the spontaneous fission of a `""^(235)U` nucleus into two stable daughter nuclei with atomic numbers 39 and 53. From Appendix F, determine the name of the (a) first and (b) second daughter nucleus. From Fig. 40-6, approximately how many neutrons are in the (c) first and (d) second? (e) Approximately how many neutrons are left over?

Answer

a.yttrium,b. iodine; c. 50 neutrons d. 74 neurtons e. 19