Conservation of nucleons in nuclear fission

Steps:

• Uranium-235 has 235 nucleons; absorbing 1 neutron gives 236 total nucleons.
• Fission produces 2 daughter nuclei and 3 neutrons, so nucleons in daughters + 3 = 236.
• Krypton-92 has 92 nucleons.
• Other daughter has 236 - 92 - 3 = 141 nucleons.

Why B is correct:

• 141 follows from conservation of mass number, where total nucleons before equal those after (A=235+1=236).

Why the others are wrong:

• A. 92 totals 92+92+3=187 nucleons, violating conservation.
• C. 144 totals 92+144+3=239 nucleons, exceeding 236.
• D. 327 totals 92+327+3=422 nucleons, far exceeding 236.

Final answer: B