A sample of iodine-126 has an activity of 10.00 mCi. How many nanograms of I-126 are present in the sample? [Half-life and atomic mass data can be found in the reference table linked in Question-0.] Answer: ___ nanograms
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A sample of iodine-126 has an activity of 10.00 mCi. How many nanograms of I-126 are present in the sample?
[Half-life and atomic mass data can be found in the reference table linked in Question-0.]
Answer: ___ nanograms
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- 1.The half life of radium - 226 isn1. 8×10^3 years. a. What is the activity in Curries of 3.00 g sample of Ra-226? b. What is the mass in grams of a sample of Ra-226 that has an activity of 1.30×10^9 atoms /min.You find a 37.2 g fossilized bone that has an activity of 0.024 counts per second. How old is the bone? Please give your answer in years.The half-life of Ra-226 is 1.60 x 10^3 years = 5.05 x 10^10 s Find k What is the activity in curies of a 1.00 g sample? What is the mass in grams of a Ra-226 sample that has an activity of 1.00 x 10^9 atoms/min?
- Would you kindly explain step by step as you answer the following question... A sample of material contains one milligram of Iodine-131. Iodine -131 has a half - life of 8.02 days. Find:a) The number of atoms of iodine-131 initially presentb) The activity of the sample in becquerelA radioactive sample has an activity R. For each of the following changes, indicate whether the activity would increase, decrease, or remain unchanged. HINT Relate the sample's activity R to each of the quantities being changed. Click the hint button again to remove this hint. (a) The number of radioactive nuclei in the sample is doubled. O The activity would increase. O The activity would decrease. O The activity would remain unchanged. (b) The half-life of the radioactive nuclei is doubled. O The activity would increase. O The activity would decrease. O The activity would remain unchanged. (c) The decay constant is doubled. O The activity would increase. O The activity would decrease. O The activity would remain unchanged. (d) A time period equal to two half-lives is allowed to elapse. O The activity would increase. O The activity would decrease. O The activity would remain unchanged.After production, a 300µl solution with a specific activity of 50 GBq/ml was torn. Delivery timeis 1 day. The half-life of the isotope is 4 days. Find the amount of solution that needs to besent so that the customer has 3.0 GBq at the date of delivery.