Physics (AS & A Level) · May / June 2023 · Paper 12 · Question 39

A neutron $_{0}^{1}\text{n}$ is fired at a $_{92}^{235}\text{U}$ nucleus. The neutron is absorbed by the nucleus which then splits to form nuclei of $_{56}^{141}\text{Ba}$ and $_{36}^{92}\text{Kr}$. What is the number of free neutrons emitted when the $_{92}^{235}\text{U}$ nucleus splits?

1. A0
2. B1
3. C2
4. D3

As printed in the paper