The half life of Uranium-238 is:
Correct answer: D. 4.5 x 10^9 years
- A. 1.67 x 10^8 years
- B. 4.5 x 10^8 years
- C. 3.3 x 10^9 years
- D. 4.5 x 10^9 years
Explanation
Option D is the most accurate option. The half-life of Uranium-238 is approximately 4.5 x 10^9 years. This means that it takes 4.5 billion years for half of a sample of U-238 to undergo radioactive decay.
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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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