(Description) Figure 22 A plot of the number of remaining atoms against the number of half-lives. 50% of atoms remain after one half-life, 25% after two half-lives and so on ...

Week 5: What we learned from the Moon

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This is a plot of the number of remaining atoms against the number of half-lives. 50% of atoms remain after one half-life, 25% after two half-lives and so on.