On irradiation of a radioactive element with neutrons, a radiochemist discovered a new nuclide having a half-life of 30 minutes. Two hours after the irradiation, the observed radioactivity due to nuclide was 10 dis./minute. What is the initial decay rate of this element (in dis/min)?

Q: Zinc-71 decays to a gallium-71 nuclide with a half-life of 2.45 minutes. What percent of a zinc-71…

A: We have to find out the percentage of zinc for the given question

Q: The nuclide 3Cl decays by beta emission with a half-life of 37.2 min. A sample of 0.40 mol of H*Cl…

A: Half life of the reaction is the time of the reaction in which the concentration of the reactant…

Q: Phosphorus-30, which has a half-life of 150 seconds, decays by positron emission. How long will it…

A: The Radioactive decay follows first-order kinetic and thereby its formulae. As we know, t1/2 × k =…

Q: A patient is injected with 7.58 μCi7.58 μCi of radioactive iodine‑131 that has a half‑life of…

A:

Q: The rate constant for a certain radioactive nuclide is 9.4 x 103h-1. What is the half-life of this…

A:

Q: A 76 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A: Given : Half life=12 hr Initial amount, [A]o=76 mg The final amount, [A]=? Time, t=3.5 days= 3.5 x…

Q: A patient is given 0.500 ug of technetium -99m, a radioactive isotope with a half-life of 6 hours.…

A:

Q: A 56 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A:

Q: 187 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Half-life of Cs is 30.2 years. Intial amount sample = 100 g  Final amount sample = 1.00 g

Q: A patient is given 0.050 mg of technetium-99m, a radioactive isotope with a half-life of about 6.0…

A: Given,0.050 mg of technetium-99m,Half-life is 6.0 hours.1.0×10-3 mg

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: A patient is given 0.050 ug of technetium-99m, a radioactive isotope with a half-life of about 6.0…

A: Given: Mass of technetium-99m = 0.050μg half life= 6.0 h Mass of technetium to decay= 1.0×10-3μg

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 4.4 g remain. What is the original…

A: The Answer to the following question is-

Q: The half-life of the nuclide 211 At is 7.5 h. If 0.100 mg of this nuclide is administered for…

A: The answer to the following question is-

Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 57.1 h?

A: The half-life of the isotopes can be described as the time at which the amount of the activity…

Q: NUCLEAR REACTIONS Nickel-56 decays with a half-life of 6.075 days. 1. Write the balanced nuclear…

A:

Q: A radioactive nuclide of mass number 94 has been prepared by neutron bombardment. If 4.7 µg of this…

A: Rate of disintegration for radioactive nuclide = λ[A]1 Where λ is disintegration constant Now , 20…

Q: 2. A radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013…

A: Radioactive disintegration follows first order kinetics.

Q: Iodine-125 (125I) is used to treat, among other things, brain tumors and prostate cancer. It decays…

A:

Q: The radioactive nuclide P# has a half-life of 14.3 days. How long would a waste containing 10 mg/L…

A: Answer: Radioactive reactions are first order reactions, therefore integrated rate law of first…

Q: Ten grams of the plutonium isotope 239Pu were released in a nuclear accident. How long will it take…

A: Step : 1               How long will it take for the 10 grams to decay to 1 gram?

Q: A sample of lead isotope Pb decays by 209 82 emitting an alpha particle to form the nuclide W. If…

A:

Q: Tc-99 is often used in medicine and has a half-life of about 6 hours. if a patient is given 30.0…

A: First of all you need to find the radioactive decay constant of this nuclei. Which is nothing but -…

Q: 14C decays to 12C with a half-life of about 5,700 years. Suppose you find a fossil in which the…

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

Q: A sample of Tl-201 has an initial decay rate of 5.88 × 10^4/s. How long will it take for the decay…

A: First, the rate constant value is determined by using the given half life period.

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 5.2 g remain. What is the original…

A:

Q: The half life of iodine-125 is 60 days. What fraction of iodine-125 nuclides would be left after 360…

A: As per guidelines if multiple questions posted , first question is allowed to answer , please post…

Q: A 56 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A: Consider the given information is as follows; Half-life of the nuclide t12 = 12 hours Initial amount…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.3 g remain. What is the original…

A: Answer

Q: NUCLEAR REACTIONS Nickel-56 decays with a half-life of 6.075 days. 1. Write the balanced nuclear…

A:

Q: Phosphorus-30, which has a half-life of 150 seconds, decays by positron emission. How long will it…

A: Since the decay reactions are first order. Hence half life = ln(2) / K  where K = decay constant…

Q: One of the nuclides in spent nuclear fuel is UU-235, an alpha emitter with a half-life of 703…

A: The half-life of U-235 is = 703 million years The time to reach the amount of U-235 to 1/4 of its…

Q: The radioactive cobalt isotope, "Co, has an half-life of 63 months and undergoes decay. The m of Co…

A: From the data  A) We are calculating number of moles of cobalt after 5 years B) The activity of…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.8 g remain. What is the original…

A:

Q: ubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the…

A:

Q: The radioactive nuclide Plutonium-199 has a half-life of 43.0 min. A sample is prepared that has an…

A: Half-life of radioactive substance: T1/2 = 43.0 min Initial activity of radioactive substance: AO =…

Q: 14Cdecays by B-emission and after 12.0 h, ninety percent of the radioactive substance remains.…

A:

Q: Phosphorus-30, which has a half-life of 150 seconds, decays by positron emission. How long will it…

A: Nuclear reactions or nuclear decay follows first order kinetics. Given: Half life t1/2 = 150.…

Q: Strontium-90, a beta emitter, has a half-life of 28.1 years. a. Write the balanced nuclear equation…

A: Beta decay of any nuclide brings about the changes in the atomic number whereas the mass number…

Q: A radioactive isotope has a half-life of 84.5 minutes. How long will it take for the radiation from…

A: Half life t1/2 = 84.5 min = 5070 s

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.0 g remain. What is the original…

A:

Q: With a half-life of 6.56 minutes, aluminum-29 decays to silicon-29 nuclide. After 18 minutes, what…

A:

Q: A patient is given 0.050 mg of technetium-99m, a radioactive isotope with a half-life of about 6.0…

A: decay constant , k = 0.693t12 = 0.6936 hour-1  integrated rate equation for radio active decay (…

Q: 4. The remnants of an ancient fire in a cave in Africa showed a 'C decay rate of 3.9 counts per…

A: The half-life of a reaction is the time taken for the reactant to reduce to half its initial value…

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

A: As per the rules, only three sub-parts can be answered:

Q: The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10 hours.…

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.