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carbon-11 is used in medical imaging. the half life of this radioisotope is 20.4 min. what...
The radioisotope ¹⁴C (half life = 5730 years) is used for carbon dating. What is the first order rate constant for ¹⁴C?
Nuclear imaging tracers have a radioactive half life that depends on the radioisotope. For example, the half-life of 18F is 110 minutes. However, the tracer is also eliminated from the body with a biological half life that depends on the tracer molecule. For example, a cardiac imaging agent called Cardiolite is eliminated from the body with a half life of 6 hours. The effective half life of a nuclear imaging agent is calculated as 1/teff 1/trad 1/tbio, where teff is...
A. Consider a radioisotope “X” with a half-life of 2.5 years. Determine (to the nearest 0.1 mg) how much of a 1000 mg sample of “X” remains after a period of 17.5 years (show all work). B. In radioactive dating using carbon-14 and carbon-12, why is it essential that carbon-12 be a stable isotope?
1. Consider a radioisotope “X” with a half-life of 2.5 years. Determine (to the nearest 0.1 mg) how much of a 1000 mg sample of “X” remains after a period of 17.5 years (show all work). 2. In radioactive dating using carbon-14 and carbon-12, why is it essential that carbon-12 be a stable isotope?
The half-lives of different radioisotopes are given in the table. Half-life (min) Radioisotope argon-44 12 lead-196 37 22 potassium 44 indium-117 43 If the initial amount of potassium-44 is 8.8 g, how much potassium-44 is left in the body after 44 min? mass: g TOOLS x10 What is the half-life of an isotope that decays to 12.5% of its original activity in 70.6 h? half-life: h The half-lives of different radioisotopes are given in the table. Half-life (min) 12 Radioisotope...
Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is 44.5 days. If you begin with 43.5 mg of this isotope, what mass remains after 55.2 days have passed? mg
1.) What is the missing particle? 2.) Carbon-14 decays by beta emission and has a half-life of 5,730 years a.) Write the balanced equation for this reaction. b.) What percentage of a sample remains after 3,310 years? 3.) Bismuth-214 is an a-emitter with a half-life of 19.7 min. How long does it take for 75.0% of to decay?
Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is 44.5 days. How much time is required for the activity of a sample of iron-59 to fall to 19.0 percent of its original value? days Submit Answer values if needed for this question. Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9 hours. If you begin with 37.2 mg of this isotope, what mass remains after 189 hours...
Some Radioactive isotopes Useful in Medical Imaging Mode of Isotope Decay Half-life Use in Medical Imaging 8 MP EC. Carbon-11 Fluorine-18 Phosphorus 32 Chromium-51 Tron-59 Gallam-67 Selenium-7 Krypton 81m Strontium-51 Technetium-99 Iodine 131 Mercury-197 Thallium-201 20.3 m 109 m 14.30 27.70 45 78.3 h 118d 1335 EC FC Brain canto trace Klucose metabolism Brain can to trace glucose metabolism Detect eye tumor Diagnose albinism, image the wpleen and gastrointestinal tract Bone marrow function, diagnos is Whole body scan forumo Pancreas...
Carbon-14 is a radioisotope that is used for dating biological organisms. The half-life of C-14 is 5730 years. When a one-gram sample of carbon from fresh peat is measured for radioactivity, 900 beta decays are recorded every hour. A one-gram sample of carbon is obtained from a peat deposit and is measured for radioactivity. If 113 beta decays are observed every hour, how many half-lives of C-14 have passed since the deposit was formed? A. 1/8 B.3 C.113 D.8 Approximately...