Moderate
Let X be a radioactive element having No nuclei. The time required to decay this element to one half of its initial number No is known as:
Correct answer: C. Half life
- A. Law of radioactive decay
- B. Decay constant
- C. Half life
- D. Decay time
Explanation
Half-life is the time taken for the radioactivity of a specified isotope to fall to half its original value.
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About Nuclear Physics
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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