When the U-235 nucleus is struck with a neutron, the Ce-144 and Sr-90 nuclei are produced, along with some neutrons and beta particles.
-How many beta particles are emitted?
A) 5
B) 6
C) 3
D) 2
E) 4

Question

Quizplus · Accepted Answer

The U-235 nucleus, when struck by a neutron, undergoes fission to produce Ce-144 and Sr-90, among other products. The atomic number of U is 92, Ce is 58, and Sr is 38. The difference in atomic numbers (92 - 58 - 38 = -4) indicates that 4 beta particles (which are electrons emitted from a nucleus during radioactive decay, effectively converting a neutron into a proton) are emitted to conserve the charge.

When the U-235 Nucleus Is Struck with a Neutron, the Ce-144