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I am Lyosha [343]
3 years ago
11

Half of a sample of cobalt-60 decays after 5.26 years to form atoms of another element. Half of a sample of iodine-131 decays af

ter 8.1 days to form atoms of another element. Which best explains this difference? 1Choice 1 Iodine-131 has a smaller atomic number than cobalt-60. 2Choice 2 Iodine-131 has a shorter half-life than cobalt-60. 3Choice 3 Iodine-131 has a smaller atomic mass than cobalt-60. 4Choice 4 Iodine-131 has half the radioactive energy of cobalt-60.
Chemistry
1 answer:
Sindrei [870]3 years ago
3 0
<h3>Answer:</h3>

Iodine-131 has a shorter half-life than cobalt-60.

<h3>Explanation:</h3>

<u>We are given;</u>

  • Half of a cobalt-60 sample decays after 5.26 years
  • Half of an Iodine-131 sample decays after 8.1 days

We are supposed to explain the difference between the two instances;

We need to define half life;

  • Half life is the time half of a given sample takes to decay leaving the other half of it.
  • Therefore;
  • If half of a cobalt-60 sample decays after 5.26 years then the half life of cobalt-60 is 5.26 years.
  • On the other hand, if half of an Iodine-131 sample decays after 8.1 days, then the half life of Iodine-131 is 8.1 days.
  • We can therefore, conclude that, Iodine-131 has a shorter half-life than cobalt-60.
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