Write nuclear equations for (a) alpha emission by plutonium-239, one of the substances formed in nuclear power plants, (b) beta emission by sodium-24, used to detect blood clots, (c) positron emission by oxygen-15, used to assess the efficiency of the lungs, and (d) electron capture by copper-64, used to diagnose lung disease.
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- Answer question showing fully all the steps. Solution should be simplified and easy to understand as much as possible!A radioactive isotope has a half-life of 10 minutes. At the start of an experiment, the activity of a sample of this isotope was 800 counts per second after allowing for background radiation. Calculate how long it would be before the activity fell from 800 counts per second to 200 counts per second. Time min. (Total 2 mWould 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 becquerel
- Question 04 The moderator temperature coefficient for a reactor is -8.2 pcm/ F. Calculate the reactivity defect that results from a temperature decrease of 5° F. Px = (Ax)(ax)After the sudden release of radioactivity from the Chernobyl nuclear reactor accident in 1986, the radioactivity of milk in Poland rose to 2.00 x 103 Bq/L due to iodine - 131, with a half - life of 8.04 days. Radioactive iodine is particularly hazardous because the thyroid gland concentrates iodine. The Chernobyl accident caused a measurable increase in thyroid cancers among children in Belarus. (a) For comparison, find the activity of milk due to potassium. Assume 1 liter of milk contains 2.00 g of potassium, of which 0.011 7% is the isotope 40K, which has a half-life of 1.28 x109 yr. (b) After what length of time would the activity due to iodine fall below that due to potassium?A 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.
- 11. Radium-226, 226Ra, undergoes an alpha decay. The current sample of Radium-226 has an initial activity of 5.50 × 101º Bq. (a) Identify the daughter nucleus by name, nucleon number, atomic number and neutron number. (b) What is the decay constant? (c) How many radioactive nuclei were initially present in the sample? (d) How long will it take the sample to reach an activity of 5.00 x 1010 Bq?Please bothFor a PET Positron Emission Tomography procedure, a patient is injected radioisotope, and after a couple hours can walk home without restriction. This is mainly due to: Group of answer choices a)wearing a lead apron. b)detailed instructions on radiation safety. c)the short half-life of the isotope. d)lax policy.