If a `._(92)U^(235)` nucleus upon being struck by a neutron changes to `._(56)Ba^(145)`, three neutrons and an unknown product. What is the unknown product?

Explanation

To determine the unknown product formed when a uranium-235 nucleus is struck by a neutron, we can follow these steps:

### Step 1: Write the nuclear reaction
The reaction can be represented as:
\[ _{92}^{235}\text{U} + n \rightarrow _{56}^{145}\text{Ba} + 3n + X \]
where \(X\) is the unknown product.
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