Find the activity of a sample containing 4.52 1014 iodine-131 nuclei (T1/2 = 8.0 days).
Find the activity of a sample containing 4.52 1014 iodine-131 nuclei (T1/2 = 8.0 days).
Be sure to answer all parts. Radioactive iodine−131 (t1/2 = 8.0 days) decays to form xenon−131 by emission of a β particle. How much of each isotope is present after each time interval if 82 mg of iodine−131 was present initially: (a) 8.0 days; (b) 32 days? (a) mg of iodine−131, mg of xenon−131 (b) mg of iodine−131, mg of xenon−131
Iodine-131, t_1/2 = 8.0 days, is used in diagnosis and treatment off thyroid gland diseases. If a laboratory sample of iodine-131 initially emits 9.95 times 10^18 beta particles per day, how long will it take for the activity to drop to 6.22 times 10^17 beta particles per day?
The half-life of 131I is 8.04 days. On a certain day, the activity of an iodine-131 sample is 6.36 mCi. What is its activity 37.8 days later?
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 2.10×105 Bq. How many atoms of 223Ra are present?
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 5.30×105 Bq. How many atoms of 223Ra are present? How many moles of 223Ra are present?
A patient ingests 1.58 mg of I-131 (iodine-131), a beta emitter with a half-life of 8.0 days. Assuming that none of the I-131 is eliminated from the person's body in the first 4.0 hours of treatment, what is the exposure (in Ci) during those first four hours? Express with 2 significant figures.Thank you.
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 8.80×105 Bq. 1st attempt Part 1 (1 point) How many atoms of 223Ra are present? Part 2 (1 point)Feedback How many moles of 223Ra are present?
A sample of Iodine-131 has an activity rate of 45 µCi. What is the mass of the sample?
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 5.20×105 Bq. 1st attempt Part 1 (1 point)See HintSee Periodic Table How many atoms of 223Ra are present? atoms Part 2 (1 point) How many moles of 223Ra are present? moles
If I have a sample of I(131) with a half life of 8.04 days and an initial activity of 0.5 micro-curies. How many nuclei of I(131) are contained in this sample?