If the decay constant of an element is smaller, its half life is:
Correct answer: B. longer
- A. shorter
- B. longer
- C. the same
- D. unrelated
Explanation
The decay constant (λ) and half. life (T₁/₂) are inversely related by the formula T₁/₂ = 0.693/λ. A smaller decay constant signifies a slower rate of decay, which corresponds to a longer 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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