Promethium-147 has been used in luminous paint for dials. The half-life of this isotope is 2.5 y. What is the decay constant (in /s)?

Q: Neptunium-237 was the first isotope of a transuranium element to be discovered. The decay constant…

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Q: Gadolium-153, which is used to detect osteoporosis, has a half life of 242 days. What percentage of…

A: Radioactive decay follows first order kinetics.Equation for half life, t½ = ln2 / kTherefore k = ln2…

Q: A sample of TI-201 has an initial decay rate of 5.88 x 10*/s. How long will it take for the decay…

A: Given:  Initial Rate= 5.88×104/s Rate to fall = 287/s Half life= 3.042 days

Q: The isotope 208Tl undergoes β decay with a half-life of 3.1 min.  What isotope is produced by the…

A: Nuclear reaction: A nuclear reaction must cause a transformation of at least one nuclide to another.…

Q: Determine the half life of an isotope hat decays from 450.0g to 320.0g in 50 years.

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Q: The following isotopes(listed with their half lives) have been used in the medical and biological…

A: The activity (A) of any radioactive sample is explained as the rate of decay in per unit time. Its…

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. How…

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Q: What is the half-life (t1/2) of a radioisotope if 1000 grams of the sample decays to 125 grams in…

A: The nuclear half-life is amount of time it takes for half of sample to decay radioactively.…

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

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Q: A sample of TI-201 has an initial decay rate of 5.88 x 10' dis/s. How long will it take for the…

A:

Q: gold -198 is used in the diagnosis of liver problems. the half-life of 198au is 2.69 days. if you…

A: Calculating the rate constant for first order reaction using half-life: t1/2=0.693k     .....(1)…

Q: What is the half life of a radioactive sample , if 3/4 of its nuclei decay in 2 years ?

A: Given:The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass =…

Q: 2Bi is a radioactive isotope of the element bismuth with a half-life of 19.7 minutes. What…

A: Given: half-life of isotope of bismuth is 19.7 minutes.

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. How…

A: We have to predict the time taken.

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A: Given-> Half life = 78.2 hours Initial amount = 44.2 mg Time = 97.0 hours

Q: The half-life of Uranium is 235 (U235) decaying to lead 207 (Pb 207) is 704 million years suppose an…

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Q: Strantium 90 is a major component of the detonation of nuclear explosives, it is particularly…

A: Radioactive substances disintegrate in nature due to their instability. The disintegration process…

Q: The nuclide 19O, prepared by neutron irradiation of 19F, has a half-life of 29 s.(a) How many 19O…

A: Radioactive decay follows first order kinetics.

Q: 1. Rubidium-87 is a radioactive isotopes ocurring in natural rubidium. The decay constant is…

A: 1- We will determine first the half life in second unit :  We know that, Half life equation for…

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

A:

Q: The isotope 83212Bi has a half-life of 1.01 years. What mass (in mg) of a 2.00-mg sample will not…

A:

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

A: The half-life of any radioactive element is the time in which it has been consumed half of its…

Q: Radioactive C14 undergoes exponential decay with a half-life of 5730 years. What is the decay

A: Radio active decay follows first order kinetics Decay constant  = 0.693/t1/2

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A:

Q: " Ca is used in the study of bone formation. The half-life of Ca is 4.54 days. If you begin with…

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A:

Q: The decay constant for the element X is 6.931 yr⁻¹. What is the half-life?

A: Relation between decay constant (K) and half life (t12) of an element:-t12 =0.693K

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

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Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium- 67 is 78.2 hours.…

A: Given   The half-life is 78.2 hours. The fall in activity of gallium-67 is 29.1 percent of its…

Q: A sample of a newly discovered element, West Virginium, has a half-life of 288 years.  How long…

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Q: The isotope 166-Yb decays by electron capture with a half-life of 57 hrs. What percentage of the…

A: We have to calculate the percentage of isotope left

Q: The isotope 100 Tc has a half life of 16 sec, what is the radioactive decay constant, k?

A: Given: Half life of isotope 100Tc = 16sec As all radioactive process are first order reactions using…

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A:

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

A:

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Given half life = 8.04 days time = 12.7 days initial mass = 31.1 mg

Q: A nuclear power plant emits into the atmosphere a very small amount of krypton-85, a radioactive…

A: Given: Half life (t1/2) = 10.76 years  Total time (T) = 25 years

Q: The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced…

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Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: The half life of radon = 3.82 days. Initial amount = 37.9 mg  time = 4.70 days mass remains after…

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A:

Q: The half-life of 98AU is 2.7 days. If you begin with 5.6 mg of this gold isotope, what mass remains…

A: Half-life is the time required for the reaction to be half completed. It is denoted by t1/2 . For a…

Q: What is the half life of a radioactive sample, if3/4of its nuclei decay in 2 years?

A: The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass = 1The…

Q: 1) Co-60 is used extensively in radiotheraphy as a source of y- rays. Its half life is 5.27 years.…

A: a) Given: Its half-life is 5.27 years. The number of years does Co-60 to decrease to 35 % of its…

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 stroncium-90 is 28 years. How long will it take a 50-mg sample to decay to a mass…

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Q: The decay constant or the beta decay of ^99 43TC was found to be equal to 1.0x10-13/s. What is the…

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Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

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Q: lodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

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

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.