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8 July, 04:15

Suppose an isotope has a half-life of 10 years. If you start with 50 grams of the isotope, how much of it will you have in 10 years?

50 grams

25 grams

12.5 grams

6.25 grams

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Answers (1)
  1. 8 July, 07:00
    0
    The half life of a decaying substance is defined as the time at which the substance decreases to one-half of its original value. In this case, given hlf-life of 10 years and an original mass of 50 grams, after 10 years, the isotope mass becomes 50*0.5 or 25 grams. Answer is B.
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