Particles not emitted by a radioactive substance are:
Correct answer: C. Protons
- A. γ-rays
- B. Electrons
- C. Protons
- D. 42He
Explanation
In natural radioactivity α, β and γ radiations are emitted. These are the only three nuclear radiations.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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