The half-life of mercury-197 is 64.1 hours. If a patient undergoing a kidney scan is given 5.0 ngng of mercury-197, how much will remain after 8 days? Express your answer using two significant figures.   After 35 days? Express your answer using two significant figures.

Q: Technetium-99m, a metastable state of technetium-99 commonly used in nuclear medicine, has a…

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Q: Iodine-131 has a half life of 8 days. Your friend with a thyroid condition is given 40 mg of I-131…

A: Radioactive decay follows the first-order kinetics. The half-life of the first-order reaction does…

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

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Q: Carbon-14 has a half-life of 5730 yearsyears. In a plant fossil, you find that the 14C14C has…

A: Given information is as follows: Half life t12=5730 years Initial amount A0 = 1.00 g Final amount  A…

Q: carbon from a cypress beam obtained from the tomb of an ancient egyptian king gave 9.2…

A: The decay constant can be calculated as

Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A: We know that,→ Radioactivity Phenomena follow first oroen kinetics.So, Rate = KA1 K → Rate…

Q: The half-life of 218Po is 3.1 minutes. How much of a 146 gram sample remains after 0.40 hours? 130…

A: Since the decay reactions are first order reactions And we know that the relationship between the…

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A:

Q: Iodine-131 has a half-life of 8.1 days and is used as a tracer for the thyroid gland. If a patient…

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Q: A 116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A: Given- Initial amount=116.8ng Final amount=14.60ng Time=47days

Q: 120 mg sample of technium 99m is used for a diagnostic test. if a technium 99m has a half-life of…

A: Given- Initial mass = 120 mg Half life = 6.0 hrs To find- milligrams of the technetium 99M sample…

Q: The half life of I-123 is 13 hours. If 29 mg if I-123 are administered to a patient, how much I-123…

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Q: What is the half-life of the bizarre isotope Toddium - 419 (it is a makeup element) if after 4.00…

A: Time period, t = 4.00 weeks Initial amount, [A]o =950.0 g Final amount, [A] = 29.6875 g Calculation…

Q: The half-life of I-123 is 13 hours. If 10 mg of I-123 are administered to a patient, how much I-123…

A: All isotopic decomposition follows first order reaction. So the amount remaining after particular…

Q: A certain radioactive substance has a half-life of 50 hours, that is, half of the original quantity…

A: The given data contains, half-life = 50 hours.

Q: Use the table on the right to answer the following questions. 11. How long is a half-life for…

A: Note : As per our guidelines , we are supposed to answer only subparts of first question (11 to 14)…

Q: Gold-191 has a half-life of 12.4 hours.  What mass of this isotope would remain after 49.6 hours if…

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Q: If the half-life for I-131 is 8 days and a patient is given 1.35 mg of this nucleus at 5:00 am in…

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Q: 210Rn has a half-life of 2.4 hours. You have a sample that contains 24 g of 210Rn. How much 210Rn…

A: The relationship between the half-life, T1/2 and the decay constant is given by  or,  The…

Q: The half-life of Tl-201 is 3.0 days. How many days will it take until the activity of the Tl-201 in…

A: The radioactive decay follows first-order kinetics. The half-life of a radioactive substance is…

Q: How much of a 560-mg sample of a radioactive substance is left after 102 years if the half-life of…

A: Half life of any substance is defined as the time taken to reduce the initial concentration to its…

Q: 8. Strontium-90 has a half-life of 28.1 years. Starting with 2.08 mg of this isotope, what is the…

A: Radioactive decay follows first order kinetics. Using this we will calculate all parts of questions.

Q: how much C-14 would be left from a 5000 year-old sample that started as 150 grams? (One Answer) N =…

A: All the values are given in the question and formula is given. Put the values and get the answer.

Q: If there are 52 milligrams left from a 0.26-gram sample of a radioactive substance after 46 hours,…

A: In this question, we have to calculate the half life If there are 52 milligrams left from a…

Q: Iodine-131 is often used in nuclear medicine to obtain images of the thyroid. If you start with…

A: We have given that  Iodine-131 is often used in nuclear medicine to obtain images of the thyroid. If…

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. What is the half-life of…

A: Given, t = 190 days t1/2 = ?

Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

A: We have to calculate the amount lost .

Q: Nitrogen-13 has a biologic half-life of 2.84 minutes and emits positrons.    If a patient is…

A: Initial concentration of nitrogen-13 = 500.0 micrograms  Half- life = 2.84 minutes  Half-life means…

Q: The Cl isotope is a radioactive isotope that emits beta radiation and has a half-life of 40 minutes.…

A: Amount of sample left after 80 minutes (2 half lives) can be calculated as: A=Ao2n=0.4022=0.10 moles…

Q: A scientist is taking measurements on an unknown isotope to determine its half life. If the…

A: Radioactive decay is followed first order kinetics  Decay constant                  λ =2.303t…

Q: If the half-life of C-14 is 5730 years, how much C-14 would be left from a 5000 year-old sample that…

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Q: The iodine-131 nuclide has a half-life of 8.0 days. If you originally have a sample containing 728-g…

A: Known: Half-life  = 8.0 days Original mass = 728 g Time elapsed = 6.86 weeks = (6.86 ×7)…

Q: If you have 2.0 grams of a radioactive substance left after 5 half-lives, how much did you start…

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Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

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Q: he half-life of 14/6 C is 5730 years. If a mummy wrapping contains about 1/2 as much 14/6 C as…

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Q: After 24 days, 2.0 mg of an original 128 mg sample remain. Find the half-life of the sample. a. 2…

A: Given: Initial amount of sample = 128 mg Remaining amount of sample = 2.0 mg Time elapsed = 24 days

Q: Archaeologists used pieces of burned wood, or charcoal, found at the site to date prehistoric…

A: Given, half life of C-14 = 5730 years. Exponential decay equation : A(t) = Ao ekt Since half life is…

Q: 5. TI-201 can be used to assess the damage to the heart muscle in a person who has suffered a heart…

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Q: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

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Q: Carbon-11 is a radioactive isotope of carbon. Its half-life is 20.3 minutes. What fraction of the…

A: When the rate of the reaction is directly proportional to the first power of the concentration of…

Q: Carbon-14 dating is used to find the age of ancient objects. The half-life of Carbon-14 is 5730…

A: Given : Half life of Carbon-14 = 5730 years  And the piece of clay pot has undergone 1.5 half lives.…

Q: A radioactive isotope, X-90, has a half-life of 82.6 years. How many years (y) will it take for 34 %…

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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: The expression that relates the initial number of radioactive nuclei remaining after decay after a…

Q: long after an animal dies will it take for the C14 to decrease by 60 percent (to 40 percent of its…

A: Answer  Calculate the half life

Q: A certain drug has a half-life in the body of 2.0 h. Suppose a patient takes one 50.0 mg pill at…

A: A drug can be defined as medication which is used to cure and treat diseases.

Q: Different radioisotopes (Links to an external site.) have different half-lives (Links to an external…

A: 1. Half-life of a radioactive element is the time taken by it to decease it's concentration by a…

Q: The half‑lives of different medical radioisotopes are given in the table. If the initial amount of…

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Q: Technetium‑99m, an important radionuclide in medicine, has a half‑life of 6.0 hours. What percentage…

A: Given  Half life ( t1/2 ) = 6 hours

Q: If the half-life of compound FUSHA is 131 years, assuming that a 500g sample of meteorite containing…

A:

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.