How many neutrons formed during nuclear fission of U-235?

Options

A. 3
B. `oo`
C. 10
D. 35

Explanation

To determine how many neutrons are formed during the nuclear fission of Uranium-235 (U-235), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nuclear Fission**:
- Nuclear fission is a process where the nucleus of an atom splits into two or more smaller nuclei, along with the release of energy and neutrons.

2. **Identify the Reaction**:
- When U-235 undergoes fission, it typically absorbs a neutron. The reaction can be represented as:
\[ \text{U-235} + \text{n} \rightarrow \text{Ba-141} + \text{Kr-92} + 3\text{n} \]
- Here, U-235 absorbs a neutron (n), resulting in the formation of Barium-141 (Ba-141), Krypton-92 (Kr-92), and the release of 3 neutrons.

3. **Counting Neutrons**:
- From the reaction, we see that the fission of one U-235 nucleus produces 3 neutrons.

4. **Chain Reaction**:
- The 3 neutrons released can go on to initiate further fission reactions in other U-235 nuclei. Each of these reactions can also produce additional neutrons, leading to a chain reaction.

5. **Conclusion**:
- While the immediate fission of one U-235 nucleus produces 3 neutrons, the process can continue indefinitely as long as there are enough U-235 nuclei to react with the released neutrons. Therefore, the total number of neutrons produced can be considered infinite in a sustained chain reaction.

### Final Answer:
- The number of neutrons formed during the nuclear fission of U-235 is effectively infinite due to the chain reaction process.

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