The atomic energy is derived by splitting the nuclei of a:
Correct answer: D. Radioactive atom
- A. Radioactive element
- B. Radioactive cell
- C. Radioactive substance
- D. Radioactive atom
Explanation
In a nuclear fission reaction, the nucleus of a radioactive atom such as uranium-235 is split, releasing energy and more neutrons. “Radioactive element” is a broader material description, but the question asks for the individual unit whose nucleus is split.
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