The following isotopes(listed with their half lives) have been used in the medical and biological sciences Arrange these isotopes in order of their relative decay activities: ^3 H(12.2 years), ^24 Na(15 hours), ^131 I (8 days), ^60 Co (5.3 years), ^14C (5730 years)

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

A: Chemical kinetics is the branch of chemistry that mainly deals with the rate of reaction and change…

Q: What is the half-life of a radioactive substance if after 5 years 95 percent of an initial amount…

A: Half life of a given radioactive substance is that time duration in which it's amount reduced half…

Q: o-60 is used extensively in radiotherapy as a source of y-rays. Its half-life is 5.27 years. a) How…

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Q: The amount of ",C still present at any time in the tree may be denoted as N and No, is the initial…

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Q: Cobalt-60, used in cancer therapy, decays by beta and gamma emission. The decay constant is 4.18 x…

A: Half-life is the interval of time required for one-half of the atomic nuclei of a radioactive sample…

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

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Q: If a tree dies and the trunk remains undisturbed for 1.210 × 10⁴ years, what percentage of the…

A: given data is  half-life is 5730 years remains undisturbed for 1.210 x 104 years

Q: Complete the given table. Round half-lives to one decimal place and values of k to six decimal…

A: The exponential decay of the radioactive substance is given as A = A0ekt The amount of radioactive…

Q: Thorium, a rare element in the earth's crust, has over seven radioactive isotopes. Of of these Th…

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Q: A zircon sample contains 4000 atoms of the radioactive element 235U. Given that 235U has a half-…

A: Time required to decay to 125 atoms os given below

Q: The half-life of radium-226 is 1.60 × 10' yr. How many hours will it take for a 2.50-g sample to…

A: The decay reactions are first order reactions. Hence for the first order reactions we can say that…

Q: A radioactive substance decays at a rate proportional to the amount present. If 45 percent of a…

A: Given :   Time (t) = 20 years  Percentage of substance decays = 45 %

Q: NUCLEAR REACTIONS Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear…

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Q: The half life for the decay of carbon-14 is 5.73 x 10° years. Suppose the activity due to the…

A: Here by applying first order disintegration equation ,we can determine the age of artifacts.

Q: A hepatobiliary scan is a common technique used to assess the functionality of a patient's…

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Q: The half life of an isotope is 43 seconds. How long does it take 100.0g of that isotope to decay to…

A: Half life = 43 second k = 0.693half life= 0.69343 sec=0.016 s-1

Q: 17. If it takes 12 half-lives for a radioactive chemical (k = 4.85 x 10-2 day¹) to decay to a level…

A: Half-life is the time taken for half of the radioactive atoms of a specific radionuclide to decay

Q: Tritium, which is , has a half-life of 12.3 years. Calculate the amount of time it would take for…

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Q: How long would it take for the amount of u-235 to reach 1/8 of its initial amount? One of the…

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Q: Copper(II) acetate containing copper-64 is commonly used to study brain tumors. This isotope has a…

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Q: The isotope 32P emits radiation and has a half-life of 14.3 days. Calculate the decay constant in…

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Q: The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity due to the…

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Q: Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0…

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Q: 24 Am is used in many home smoke alarms. It has a decay half-life of 457 years. How long does it…

A: All radioactive decay follows first order kinetics. So in order to solve for the time required we…

Q: In medical application prior to having an MRI, a patient will be administered a dye containing a…

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Q: Determine the decay constants ( in seconds) for iodine and magnesium given half lives are 8.04 days…

A: Relationship between half life and decay constant is given as,

Q: If a tree dies and the trunk remains undisturbed for 1.895 × 10ª years, what percentage of the…

A: Mass% is equal to the ratio of the mass of the given substance to the total mass of the substance.…

Q: One of the radioactive isotopes used in medical treatment or analysis is iodine-131. The half-life…

A: The relationship between the decay constant and the half-life period is given below.

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

A: Given data is as follows: The initial amount of C-14, A° = 100 The amount left after time "t" , A=…

Q: 1.Write the nuclear equation for the radioactive decay of radium-226 by alpha decay.

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: What is the half-life of an isotope that decays to 3.125% of its original activity in 63.6 h?…

A: We know that,  N(t) = N0(1/2)t/t1/2 No = initial amount  N(t) = amount of substance at time t t1/2 =…

Q: The half life of the radioactive element ubtonium-31 is 10 seconds. If 80 grams of unobtanium-31 are…

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Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: The initial mass of the sample of palladium-100, No, in mg is calculated as shown below where t1/2…

Q: 13' Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

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Q: If a tree dies and the trunk remains undisturbed for 1.195 × 10⁴ years, what percentage of the…

A: Carbon dating is a technique to estimate the age of the tree or rock

Q: A rock is analyzed in the laboratory for radiometric dating and found to contain 1/8 parent atoms…

A: Any process that occurs by radioactive decay follows first-order kinetics. The equation used to…

Q: If a tree dies and the trunk remains undisturbed for 1.170 × 10' years, what percentage of the…

A: This is a first order reaction. t½ = 0.693 ÷ k 5730 = 0.693 ÷ k k = 1.21 × 10-4  year-1 where k is…

Q: The half-life of cobalt-60 is 5.3 years. How long will it take for a 1.000-mg sample of cobalt-60 to…

A: Given: The half-life of Co-60 is 5.3 years. The initial amount of Co-60 is 1.000 mg. The amount of…

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: mass of phosphorus-32,

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Q: The half-life for P-32, a radionuclide used in DNA sequencing, is 14.28 days. Calculate the…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: If pure polonium-210 (k = 5.02 x 10-3 day-1) were used in a crime, based on radioactiv…

A: We know radioactive disintegration is first order kinetics. Again we know , for first order reaction…

Q: The isotope 32P emits radiation and has a half-life of 14.3 days. Calculate the decay constant in…

A: Solution -

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: If a tree dies and the trunk remains undisturbed for 1.015 x 104 years, what percentage of the…

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Q: The half life of carbon-14 is 5730 years.it takes 870.98 years for carbon 14 to decay tp 90 mg. what…

A: The radioactive decay follows first order kinetics.

Q: The half-life of tritium, H-3, is 12.3 years. How much time would it take for a sample to drop to…

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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.