Radioactive materials can be identified by measuring their:
Correct answer: D. Half-lives
- A. Hardness
- B. Masses
- C. Densities
- D. Half-lives
Explanation
This is the most accurate option for identifying and characterizing radioactive materials. The half-life of a radioactive substance is a specific property that indicates the time it takes for half of the radioactive atoms in a sample to decay. Different radioactive materials have different half-lives, which can be used to identify and differentiate them. Measuring the half-life of a radioactive material is a key method for identifying and studying radioisotopes.
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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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