Physics for IGCSE & O level - Atoms And Radioactivity (Section 3 - No. 16)
Which of the following statements is correct regarding the relationship between half-life and the stability of a radioactive isotope?
Shorter half-life implies greater stability.
Longer half-life implies greater stability.
Half-life has no effect on stability.
Half-life is only related to activity, not stability.
Explanation
A longer half-life suggests a more stable isotope because it decays more slowly.
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