An artificial radioactive element can be made by bombarding.
Correct answer: C. High-energy particles on stable elements
- A. High-energy particles on unstable elements
- B. Low-energy particles on unstable elements
- C. High-energy particles on stable elements
- D. Low-energy particles on stable elements
Explanation
Artificial radioactive elements are created by bombarding high-energy particles (neutrons, protons, α-particles) on stable elements. These particles penetrate the nucleus, causing nuclear reactions that form new radioactive isotopes. Stable elements do not decay naturally, so high-energy bombardment is needed to induce artificial radioactivity, as seen in nuclear reactors and particle accelerators.
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