When an alpha particle encounters an atom, it eliminatesI. protonII. neutronIII. electron
Correct answer: D. II and III.
- A. I only.
- B. III only.
- C. I and II.
- D. II and III.
Explanation
When an alpha particle encounters an atom, it eliminates neutrons and electrons. Alpha particles consist of two protons and two neutrons, so they can displace neutrons in the nucleus. They can also remove electrons from the atom due to their high energy. The other options are incorrect because alpha particles do not eliminate protons alone, and they do not eliminate electrons alone. Therefore, the correct answer is that alpha particles eliminate neutrons and electrons.
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About Radioactive Decay
Radioactive decay is the spontaneous transformation of unstable nuclei, described by decay constant, activity, half life and the exponential decay law. Work includes alpha, beta and gamma emissions, decay equations and remaining nuclei, with half life distinguished from the time required for complete decay.
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