The half-life of radium-226 is:
Correct answer: B. 1620 years
- A. 1820 years
- B. 1620 years
- C. 1940 years
- D. 1680 years
Explanation
The half-life of radium-226 (226Ra) is approximately 1620 years. It decays into radon-222 by emitting an alpha particle.
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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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