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a) The half-life of iodine-125 is 59.4 days. If it has initial activity of 3.42 x 10* Bq. What it will be it is activity after one year? b) A 75.0-g sample of carbon taken from the pelvic bone of a skeleton is found to have carbon-14 decay rate of 220.00 decays/min. It is known that carbon from a living organism has a decay rate of 15.0 decays/min. g and that carbon-14 half life of 5730yr = 3.01 x 10 min. Find the age of the skeleton? (3.3)

a) The half-life of iodine-125 is 59.4 days. If it has initial activity of 3.42 x 10* Bq. What it will be it is activity after one year? b) A 75.0-g sample of carbon taken from the pelvic bone of a skeleton is found to have carbon-14 decay rate of 220.00 decays/min. It is known that carbon from a living organism has a decay rate of 15.0 decays/min. g and that carbon-14 half life of 5730yr = 3.01 x 10 min. Find the age of the skeleton? (3.3)

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[3.2] Question 9 a) The half-life of iodine-125 is 59.4 days. If it has initial activity of 3.42 x 10¹ Bq. What it will be it is activity after one year? b) A 75.0-g sample of carbon taken from the pelvic bone of a skeleton is found to have carbon-14 decay rate of 220.00 decays/min. It is known that carbon from a living organism has a decay rate of 15.0 decays/min. g and that carbon-14 half life of 5730yr = 3.01 x 10 min. Find the age of the skeleton? [3.3]
Transcribed Image Text:[3.2] Question 9 a) The half-life of iodine-125 is 59.4 days. If it has initial activity of 3.42 x 10¹ Bq. What it will be it is activity after one year? b) A 75.0-g sample of carbon taken from the pelvic bone of a skeleton is found to have carbon-14 decay rate of 220.00 decays/min. It is known that carbon from a living organism has a decay rate of 15.0 decays/min. g and that carbon-14 half life of 5730yr = 3.01 x 10 min. Find the age of the skeleton? [3.3]
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