Three types of radioactive elements are emitted when unstable nuclei undergo radioactive decay. Which of the following is not one of them?
Correct answer: D. Delta
- A. Alpha
- B. Beta
- C. Gamma
- D. Delta
Explanation
Radiation involves the release of alpha particles (2 protons and 2 neutrons), beta particles (an electron), and gamma rays (photons). Delta is not part of the radiation components.
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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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