An I-131 source has an initial activity of 2.5mCi.
What is the activity after 12 days?
How much is this in Bq?
An I-131 source has an initial activity of 2.5mCi. What is the activity after 12 days?...
A radioactive substance with a half-life of 3.0 days has an initial activity of 2400 Bq. What is its activity after 6.0 days?
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?
1. 1. Iodine-131 is a radioactive isotope. After 8.00 days, 50.2% of a sample of 131I remains. What is the half-life of 131I? 2. The half-lives of different radioisotopes are given in the table below. If the initial amount of potassium-44 is 9.2 g, how much potassium-44 is left in the body after 44 minutes? 2. 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 59.9 g of 32P, how much 32P was present...
16. What will he the level of activity (in terms of X) after two half lives have elapsed? 17. What would the activity of a the above sample be if we tripled its size? 18. If the initial activity of 0.365 grams of the above sample is Y Bq, what would the activity be if we increased the initial sample to 0.950 grams? The decay curve of a radioactive nuclide 1000 sample is shown. Its initial activity is measured to...
Suppose the I-131 activity is measured at 9.4 × 10-5μCi/mL in the enclosed reactor compartment at the site of a nuclear accident. What is the minimum number of days that safety crews should wait before they can be sure the level has dropped to 1.0 × 10-6 μCi/mL? I-131 has a half-life of 8 days.
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?
lodine 131 has a half life of 8 days and decays by a first order process (as is always the case for radioactive decay). How much of a 46 gram sample of iodine 131 will remain after 8 days? Report your answer in grams.
After 1.96 days, the activity of a sample of an unknown type radioactive material has decreased to 91.2% of the initial activity. What is the half-life of this material?
Cesium-131 is a short-lived radioisotope (t1/2 = 9.70 days) used to treat prostate cancer. How much therapeutic strength does a cesium-131 source lose over 20.0 days? Express your answer as a percentage of the strength the source had at the beginning of the first day. 01 Question (point) a See page 978 1st attempt hid See Periodic Table See Hint Cesium-131 is a short-lived radioisotope (t1/2 9.70 days) used to treat prostate cancer. How much therapeutic strength does a cesium-131...
A radioactive isotope has an activity of 9.98×104 Bq initially. After 3.00 hours the activity is 6.19×104 Bq. What is the half-life of the isotope? What is the activity after an additional 3.00 hours?