After the sudden release of radioactivity from nuclear reactoraccident, radioact
ID: 1758545 • Letter: A
Question
After the sudden release of radioactivity from nuclear reactoraccident, radioactivity of milk rose to 2000 Bq/L due to Iodine 131with half life of 8.04 days. a- find the activity of milk due to potassium. assume 1 literof milk contains 2.00 g of potassium of which .0117% is the isotope40K which has a half life of 1.28 X 10^9 years. b- after what length of time would the activity due to iodinefall below that due to potassium? After the sudden release of radioactivity from nuclear reactoraccident, radioactivity of milk rose to 2000 Bq/L due to Iodine 131with half life of 8.04 days. a- find the activity of milk due to potassium. assume 1 literof milk contains 2.00 g of potassium of which .0117% is the isotope40K which has a half life of 1.28 X 10^9 years. b- after what length of time would the activity due to iodinefall below that due to potassium?Explanation / Answer
a) The activity of the radioactive substance is A = N Where = ln2/ T1/2 N= number of nuclei b) The length of time would the activity due toiodine fall below that due to potassium is obtained from A=Aoe-t et = Ao/A t = ( 2.3026log10(Ao/A) ) / Where = ln2 /T1/2 Ao= 2000 Bq/L I hope this helps you. Ao= 2000 Bq/L I hope this helps you.