Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

A strontium isotope undergoes decay by $\beta$ emission. Its activity decreases to $\frac{1}{8}$ of the starting value in 87 hours. What is the isotope's half-life?

  • A11 hours
  • B29 hours
  • C44 hours
  • D260 hours

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