Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

A sample of americium undergoes decay and becomes neptunium. Americium has a half-life of 432 years. After 1728 years, what fraction of the americium will still be present?

  • A$0$
  • B$\frac{1}{16}$
  • C$\frac{1}{8}$
  • D$\frac{1}{4}$

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