Question

which changes always happen during a fission reaction? (1 point) the number of nucleons decreases, while the number of nuclei increases. the number of nucleons decreases, while the number of nuclei decreases. the number of nucleons stays the same, while the number of nuclei increases. the number of nucleons stays the same, while the number of nuclei decreases.

Explanation:

In a fission reaction, a heavy - nucleus splits into two or more lighter nuclei. The total number of nucleons (protons + neutrons) is conserved according to the law of conservation of mass - energy in nuclear reactions. But the number of nuclei increases as one nucleus breaks into multiple nuclei.

Answer:

The number of nucleons stays the same, while the number of nuclei increases.