In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is…

Physics WAEC 1994

In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is the half life of the radioactive material

  • 0.75 days
  • 2.58 days
  • 4 days
  • 4.80 days checkmark
  • 6 days

The correct answer is: D

Explanation

64g → 32g → 16g → 8g → 4g → 2g

Half life time= 24/5 = 4.8 days
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