Question

The number of neutrons accompanying the formation of ${}_{54}^{139}\text{Xe}$ and ${}_{38}^{94}\text{Sr}$ from the absorption of a slow neutron by ${}_{92}^{235}\text{U}$ followed by nuclear fission is:

• A. 0
• B. 2
• C. 1
• D. 3

Answer 1

Answer: (D)

3

Balanced reaction is:
${}_{92}^{235}\text{U}{+}_0^{1}n{⟶}_{54}^{139}\text{Xe}{+}_{38}^{94}\text{Sr}+3_0^{1}n$