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Calculate the time it takes the activity of a sample of iodine- 128 to drop from 300 to 75.

User Magicmn
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Final answer:

To calculate the time it takes for the activity of a sample of iodine-128 to drop from 300 to 75, we need to know the half-life of iodine-128.

Step-by-step explanation:

To calculate the time it takes for the activity of a sample of iodine-128 to drop from 300 to 75, we need to use the concept of half-life. The half-life of iodine-128 is not given in the provided information, so we cannot answer the question with the provided information. However, if we knew the half-life of iodine-128, we could use the formula:

t = t₀ x log(initial activity / final activity) / log(2)

Where:

  • t is the time it takes for the activity to drop from the initial activity to the final activity
  • t₀ is the half-life of the isotope
  • initial activity is the initial activity of the sample
  • final activity is the final activity of the sample
  • log is the logarithm function
User Timitry
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