Q1: If you know that the half-life of a radioactive element is equal to 20 days, find the following: The time required for the decay of 3/4 of its original atoms -1 2- The time required for 1/8 of its original atoms to remain undissolved

Q: How long will it take a radioactive sample of iodine-131 (half-life 8.07  d ) to lose 99.2  %  of…

A: The given disintegration reaction is first order reaction. Half life t1/2 = 0.693 / K 8.07 days =…

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

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Q: The amount of radio active material present at time t is given by A=Aoekt, where Ao is the initial…

A: For a first order reaction, the rate of reaction is proportional to the first power of concentration…

Q: 9. Suppose the amount of a certain radioactive substance in a sample decays from 3.80 mg to 1.70 mg…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

Q: The half-life of element X is 500 years. If there are initially 8 g of X, how much will remain after…

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Q: If you have 1 gm of pure potassium 40 (40K) that is experimentally determined to emit about 105 beta…

A: Activity of 40 K = 105 beta rays. The decay constant λ can be calculated as follows:

Q: [Review Toplcs] [References) Use the References to access important values if needed for this…

A: Carbon Dating of a Sample  using the data from question and solution is present in step-2

Q: ome Tools Section 5.5 Exercis... x Section 5.5 Proble.. Section 5.5 Proble... CRA 6 / 15 +) 106% 6.…

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Q: Carbon-11 is used in medical imaging. The half-life of this radioisotope is 20 min. What percentage…

A: redioactive decay process follows 1st order Kinetics. The intgrated ratelow for 1st : order…

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: The half-life of a radioactive element is 1,250 years.What percent of the atoms remain after 5,000…

A: Number of half lives = 50001250 = 4 100%  →1250 years 50%  →1250 years 25% →1250 years 12.5 % →1250…

Q: The isotope 185Hf undergoes B decay with a half-life of 3.50 min. (a) What isotope is produced by…

A: All radioactive decay process follow 1st order kinetics.

Q: (6) After three half-lives, 100% (A) (B) 50% (C) 25% (D) 12.5% % of the initial isotope of a…

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Q: 6C has a half life of 5,730 years. How many 6C atoms would you need in order to measure an average…

A: The half life is given as 5730 years Average Decay per Second = 10

Q: In a moon rock sample, the ratio of the number of stable 4°Ar atoms present to the number of…

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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: Prove that t½ = t ln (2)/ln(No/Nt) determines the half-life of a 30-g sample of  Pu-239 which is…

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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: This exercise uses the radioactive decay model. The half-life of strontium-90 is 28 years. How long…

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

A: Since the decay reactions are first order reactions always hence for the first order reaction we can…

Q: Suppose the amount of a certain radioactive substance in a sample decays from 7.10 mg to 5.20 mg…

A: Radioactive decays are first order reactions. Since we know that the relationship between the amount…

Q: A radioisotope “X” has a half-life of 2.5 years. Determine (to the nearest 0.1 mg) how much of a…

A: All the radioactive reactions follow first order kinetics . The term half life is defined as the…

Q: Suppose the amount of a certain radioactive substance in a sample decays from 6.50 mg to 2.40 mg…

A: Radioactive decay is a first-order reaction. On applying the value for rate constant k, we find it…

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: f In 2 Half-Life uses the formula N (t) = Noe. No = Initial Amount %3D t = time h length of…

A: Given: The initial amount of Chromium 51 = 85 mg The half-life of Chromium 51 = 27.7 days We have to…

Q: The radioactive isotope rhodium-101 decays exponentially, with a half-life of 170 minutes. Suppose a…

A: A radioactive nuclei is generally unstable. It breaks down spontaneously as its binding energy is…

Q: In living organisms, C-14 atoms disintegrate at a rate of 15.3 atoms per minute per gram of carbon.…

A: Answer is explained below. Given that, in living organisms C-14 atoms disintigrate at a rate of 15.3…

Q: A sample initially consists of No radioactive atoms of a single isotope. After a time, t, the number…

A: All radioactive reactions are 1st order reactions . N=Noe-λt At t1/2 , N = No/2 .              No/2…

Q: (Q114) A meteorite recovered from a meteor landing site in the Australian outback contains 0.438 g…

A: we have to calculate the age of meteorite

Q: Carbon-14 is a radioactive element with a half-life of about 5,730 years. Carbon-14 is said to decay…

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Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

A: We are given Radium -226 t1/2=1590 years                  (i) We know radioactive decay always…

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

A:

Q: Phosphorus-32 is a radioisotope used to detect certain types of tumors. P-32 has an effective…

A: Phosphorus-32 is a radioisotope used to detect certain types of tumours. P-32 has an effective…

Q: Q1 A sample of leather is analyzed by carbon-14 dating. The concentration of 14C in this sample is…

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Q: 17. Tritium, (3H) is used in glowing “EXIT" signs located where there is no electricity for light…

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Q: Actinium-227 is a radioactive substance that decays according to the following function, where v, is…

A: The relationship between the initial amount and final amount of reactant is given as, => y = y0…

Q: Strontium-90 is produced during the nuclear fission of uranium-235 and is part of nuclear fallout…

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Q: Stonehenge is an ancient megalithic site in southern England. Some believe it was designed to make…

A: Given: Sample=6 pound Carbon-14=0.33 Pounds t12=8333 years To find: Age of charcoal pits Solution:…

Q: Iodine-131 is a radioactive isotope. After 6.00 days, 59.6% of a sample of 13I remains. What is the…

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Q: One of the radioactive isotopes used in medical treatment or analysis is iodine-125. The half-life…

A: radio active decay are first order                       Rate constant =0.693/half life…

Q: Carbon-14 is used in radiocarbon dating. The half-life of carbon-14 is 5.73*10^3 years. How many…

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Q: 1) P-32 has a half-life of 14.3 days. How many milligrams of phosphorus-32 remain after 57.2 days if…

A: Half-life = 14.3days Initial mass = 4.0mg You will be left with half of initial mass after 14.3 days…

Q: The ¹H nucleus is composed of a single proton and therefore has a mass loss of 0 g/mol. Select the…

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Q: One of the radioactive isotopes used in chemical and medical research is iodine- 125, which has a…

A: Given -  Half life of iodine = 61 days  Initial concentration of iodine (No) - 1 g After time t…

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.