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

Answer: 3

${}_{92}{U}^{235}{\to }_{s4}X{e}^{1+2}+{}_{38}S{r}^{90}+3_0{n}^1$