Question

The number of neutrons emitted when ${}_{92}^{235}U$ undergoes controlled nuclear fission to ${}_{54}^{142}Xe$ and ${}_{38}^{90}Sr$ is ___

Answer 1

${}_{92}{U}^{235}{\to }_{54}X{e}^{142}{+}_{38}S{r}^{90}+3_0{n}^1$