The half-life of a radioactive substance is 10 days. This means that
Correct answer: D. 7/8 parts of the mass of the substance disintegrates in 30 days
- A. The substance completely disintegrates in 20 days
- B. The substance completely disintegrates in 40 days
- C. 1/8 parts of the mass of the substance will be left intact at the end of 40 days
- D. 7/8 parts of the mass of the substance disintegrates in 30 days
Explanation
Correct. After one half-life, 1/2 of the substanceIn summary, the correct option is **d. 7/8 parts of the mass of the substance disintegrates in 30 days** based on the definition of half-life
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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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