Question

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

• A. 2
• B. 1
• C. 3

Answer 1

The correct option is A 2

The balanced nuclear reaction is
$2_0{n}^1{+}_{92}{U}^{235}{\to }_{54}X{e}^{139}{+}_{38}S{r}^{94}$