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  • 20-09-2022
  • Chemistry
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5. Fluorine-21 has a half-life of approximately 5 seconds. How much of the original nuclei would remain after 1
minute if I started with 1600 g?
6. The half-life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams would
have been present 9612 years ago?

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