Iodine-131 is a radionuclide that is frequently used in nuclear medicine. Among other things, it is used to detect fluid build up in the brain. The half-life of iodeine-131 is 8.0 days. How much of a 0.16-g sample of iodine-131 will remain undecayed after a period of 32 days? a.) 0.020g b.) 0.080g c.) 0.010g d.) 0.040g

Q: A 16.0 g sample of technicium-99m has a half-life of 6.0 hours. How much sample remains 24 hours…

A: As per the given information in the question, First calculate the rate constant (K) of the…

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Q: Iodine -125 emits gamma rays when it decays to Tellerium -125 and has a half life of 60 days. If…

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Q: 5. The half life of radioactive 32P is 14.3 days. How long does it take for 100 mg of this isotope…

A:

Q: 9.) Strontium 90 is a major component of the detonation of nuclear explosives: it is I dangerous…

A: We know that no of atoms  N Present at time t  are given as N= N° e-kt where N° are the initial…

Q: Iodine-131 used to treat hyperthyroidism, has a half-life of 8.04 days. For a sample containing 10.0…

A: Half life time = 8.04 days  Initial mass = 10.0 μg  Time = 32.2 days Mass remain after 32.2 days = ?…

Q: What is the half life of radioistope if it decays to 12.5% of its radioactivity in 12 years?

A:

Q: lodine-131 is used in the treatment of tumors in the thyroid gland. Its half-life is 8.1 days.…

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Q: The half-life of potassium K-42 is 14.5 hours. (a) how much of 11g sample is remaining after 5…

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Q: Use the radioactive decay curve of iridium-192 to answer the three questions A. If the initial…

A: Radioactive decay is the procedure in which the energy of an unstable atomic nucleus falls by…

Q: What is the age (in y) of mummified primate skin that contains 7.45% of the original quantity of…

A: All radioactive decays follow first order kinetics:

Q: 6. A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the…

A: Given, Half-life - 4.5 × 109 yr. 1 mg U-238 contains 0.257 mg of Pb-206.

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Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

A: The half-life (t1/2) of Nitrogen-13 is provided as 10 minutes.

Q: Radioactive tungsten-178 decays with a half-life of 21.6 days. (a) What is the value of k in s-12…

A: Given: The half-life of tungsten-178, t1/2 = 21.6 days Seconds in a day are given as: 1 day =…

Q: The isotope strontium-90 is produced during testing of nuclear weapons.  If 100.0 mg of strontium-90…

A: Given  Initial Amount of Sr - 90  (A)o = 100 mg  Half life time ( t1/2 )  =  29 years  Time ( t ) =…

Q: Technetium-99m (the ‘m’ means a ‘metastable’ or moderately stable species) is generated in nuclear…

A: Use half life and date constant formula  Final mass= 125.95mg

Q: Carbon-14 has a half-life of 5,730 years. If a sample contained 70 mg originally, how much is left…

A: Carbon-14 has a half-life of 5,730 years. If a sample contained 70 mg originally, how much is left…

Q: Iodine-131 is used in the treatment of thyroid disease. What is the half-life of iodine-131 if a…

A: Weight of sample initially = 160mg Weight of sample finally = 5mg Time elapsed = 40 days We have to…

Q: Phosphorus-32 is used in biochemical studies to follow the pathway taken by metabolites. Its…

A:

Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

A: Radioactivity is the phenomenon in which an unstable nucleus loses energy.

Q: 20. lodine - 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If…

A:

Q: The half-life of iron-59 is 44.5 days. How much of a 3.00-mg sample will remain after 222.5 days?

A:

Q: lodine - 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If a…

A:

Q: A sample initially contains 60.0g of thorium-234. After 48 days 7.8g of thorium-234 remains…

A: The half lifetime t12of a radioactive compound is the time when it disintegrates to its half of the…

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

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Q: The half-life of cobalt-60 is 5.27 yr. How much of a 1.000-mg sample of cobalt-60 is left after…

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Q: what fraction of k-38 remains after 2.00 hours? the half-life of k-38 is 7.71 minutes

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Q: Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy…

A: There are some unstable nuclei which undergo radioactive decay by emission oc charged particles.…

Q: a radioactive isotope. Z-109 has a half life off 43.1 years. how manny years Will it take the sample…

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Q: Iron-59 is used to study iron metabolism in the spleen. Its half-life is 44 days. How many days…

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Q: approximately 25,000 years. How many undecayed nuclei remain after 100,000 years? b) calculate the…

A: We will use first order kinetics formula

Q: Iodine-131 is a convenient radioisotope to monitor thyroid activity in humans. It is a beta emitter…

A: Sodium iodide is considered as a good choice for the source of iodine because it does not pose any…

Q: What is the age (in y) of mummified primate skin that contains 7.29% of the original quantity of…

A: Given: Half-life of 14-C = 5715 years The amount of 14-C at time t = 7.29% Original quantity The…

Q: Calculate the half-life of an isotope if 155.2 mg disintegrates to 19.40 mg in 12.9 min.

A: Given    Initial Amount [ A ]0         = 155.2 mg    Remaining amount [ A ]t  = 19.40 mg   Time ( t…

Q: The half-life of Ga-67 is 77 9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A:

Q: phosphorus -32 decays to form sulfur -32. The half life of phosphorus -32 is 12 days. How much…

A: Given,Phosphorus-32 decays to form sulphur-32The amount of Phosphorus-32 initially present is 62…

Q: mass of phosphorus-32,

A:

Q: Phosphorus-32 is used in biochemical studies to follow the pathway taken by metabolites. Its…

A: a) The rate constant can be calculated from half-life time, K=0.6932t1/2 K=0.693214.3 days=0.0485…

Q: The half-life of strontium-90 is approximately 29 years. How much of a 500 g sample of strontium-90…

A:

Q: A volcanic eruption melts a large chunk of rock, and all gases are expelled. After cooling, argon-…

A: (half-life of potassium-40 is 1.25 x 10° yr) is wrong it should be 109 (half-life of potassium-40 is…

Q: The half-life of bromine-74 is 25 minutes.  How much of a 40 cpm sample is still active after 75…

A: Since bromine-74 is a radioactive element  hence it will have decay reaction  And since the decay…

Q: A bone has a carbon-14 decay rate of 4.98 disintegrations per minute per gram of carbon. If a living…

A: Solution : N0= 4.98 dpm N(t) = 15.3 dpm  t1/2 = 5715 years  t = ?

Q: The half-life of Strontium-85 is 65 days. How much of a 80. mg sample is left after 260 days? mg

A: Given: Initial mass of sample = 80 mg  Time passed = 260 days. And the half-life of isotope = 65…

Q: A volcanic eruption melts a large chunk of rock, and all gases are expelled. After cooling, argon-40…

A: Half-life of potassium-40 = 1.25 x 109 year A = The final amount of 40 K left = 1.38 mmol  A0 =…

Q: Sodium -25 has a half  life of 60.0 s. If 5.00 mg of sodium -25 disintegrated over a period of 3.0…

A: Atoms having same atomic number but different atomic masses are called isotope. For one there are…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.