In both fission and fusion, what is converted into energy?

Explanation

To answer the question, "In both fission and fusion, what is converted into energy?", we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Understanding Nuclear Fission**:
- Nuclear fission is the process where a heavier atomic nucleus splits into two lighter nuclei.
- This process typically occurs in elements with high atomic mass, such as uranium or plutonium.

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