You have 24,640 grams of a radioactive kind of bromine. If its half-life is 2 hours, how much will be left after 8 hours?  ______ grams

Q: The half life of iodine-123 is about 13 hours. You begin with 50 grams. Write an equation remaining…

A: Write the amount of iodine as a function of time (t),

Q: A radioactive substance has a half-life period of 30 days. What is the disintegration constant ?

A: We know thatλ=ln2T1/2Hereλ=disintegration constantT1/2=Half life of substance

Q: The​ half-life, T, for a particular radioactive element is14min. Find the decay rate of the element.…

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Q: What is the mass number of an alpha particle?

A: Mass number is the total number of nucleons. It is the sum of number of protons and neutrons.

Q: A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40…

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Q: Lead-214 releases both an alpha and a beta particle. What element results and what is its mass…

A: Beta particle is similar to the emission of an electron and alpha particle is similar to the…

Q: Find the mass of a radioactive isotope if 3 half-lives occured. The initial mass of material was 80…

A: Given, The initial mass of material was 80 g. Half life is time required to fall the initial value…

Q: When a nucleus of emits an alpha particle, what are the atomic number and the atomic mass of the…

A: In alpha decay, an unstable nucleus will emit an alpha particle, which is a helium nucleus composed…

Q: The half-life of 20 kg of Bismuth -210 is 20 minutes. Explain this statement?

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Q: (Figure 1) shows how the number of nuclei of one particular isotope varies with time. What is the…

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Q: When we measure the rate of radioactivity of a given isotope 60 days after making an initial…

A: The time of management is 60days

Q: A mine worker discovers an ore sample containing 500 mg of radioactive material. It was discovered…

A: Given data: Mass of radioactive material, mo=500 mg Number of half-life, n=7 Applying the formula:…

Q: The half-life of radium-226 is 1600 years. How long will it take for 10.0 mg of radium-226 to decay…

A: Using half life concept to solve the problem

Q: The half-life of a radioactive material whose rate of disintegration is proportional to the amount…

A: The half-life of a radioactive element is defined as the time required to decrease the initial…

Q: Certain radioactive substances has a half-life of 20 min. If there is 56 lbs of it right now, how…

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Q: A radioactive material has a half-life of eight days. How long will it take for the material to be…

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Q: The half-life of a particular element is 330 days. What is its decay constant?

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Q: The half-life of scandium-46 is 83.9 days. How much of a 9.0–oz sample of scandium-46 will remain…

A: Given data The half-life of the scandium-46 is t1/2 = 83.9 days. The initial amount of the…

Q: A quantity of a radioactive element gives 1,200 alpha particles every 60 seconds, and after 120…

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Q: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: Given data The half-life of the cesium-137 is t1/2 = 29.75 years. The initial amount of the…

Q: Binding energy per nucleon for an element is 7.14 MeV. If the binding energy of the element is 28.6…

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Q: A sample of polonium-208 has a half-life of 2.898 years. What percent of polonium-208 remains after…

A: The half-life of a radioactive substance is the time required for a quantity to reduce to half of…

Q: The half-life, T, for a particular radioactive element is 16 min. Find the decay rate of the element…

A: The decay rate is 4.3% per min.

Q: The half life of a radioactive nucleus is the time taken for radioactive nuclei in the given sample…

A: Half life of a is dependent on the decay constant of a nucleus and is given as,

Q: A radioactive substance has a half-life period of 30 days. What is the disintegration constant?

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Q: The radioactive element 2760Co  has a half life of ______ years. If you had a sample of 17 g, about…

A: Given: The mass of sample (m) = 17 g. The half-life of cobalt (T1/2) = 5.27 years. The life of…

Q: For questions no. 4 and 5. Given: Radium decomposed at a rate proportional to the quality of radium…

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Q: The activity of a radioactive element falls from 600 s1 to 500 s1 in 40 minutes. The half-life of…

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Q: Suppose that 3x107 radon atoms are trapped in a basement at the time the basement is sealed against…

A: Given data: The number of radon atoms present is, N0=3x107 radon atoms The half-life of radon is,…

Q: cadmium -107 has a half -life of 6,52 hours .if you start off with sample which sample which has an…

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Q: Radium decomposes at a rate proportional to the amount present. In 100 years, 100 mg of radium…

A: Given: The time is t=100 yr. The initial amount of radium is No=100 mg. The final amount of radium…

Q: Write the relationship between the size and the atomic mass number of a nucleus.

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Q: Indium-116 is radioactive and has a half life of 14.10 seconds. Calculate the activity of a 7.4 mg…

A: Half life of indium-116  ,t1/2=14.10 s Amount of the indium-116 m=7.4 mg=7.4×10-3 g Atomic mass…

Q: If the half-life of an isotope is two years, what fraction of the isotope remains after six years

A: Amount of radioactive material after time t is given by: N = N0*exp(-lambda*t) lambda = decay…

Q: A radioactive isotope has a half-life of 51.5 days. What fraction of the isotope remains after 413…

A: We have: The half-life is t1/2=51.5 days Calculating the first-order reaction constant k as…

Q: What are the types of radiation emitted by the nuclei of radioactive elements?

A: The nucleus of an atom consists of protons and neutrons. Neutrons are neutrally charged and protons…

Q: Choose the BEST answer to the following. When a nucleus of uranium-238 emits an alpha particle, left…

A: Uranium-238 follows the following decay equation,

Q: A radioactive species has 128 atoms present. If it has half-life of 5 years, calculate the number of…

A: Write the given values of this problem. N0=128 atomst=20 yearst12=5 years

Q: The You-Yangs are a series of rocky granite ridges to the south-west of Melbourne, whose rocks…

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Q: A sample of a radioactive element has a half-life of 180 days; what percent of this sample will…

A: The decay constant of a radioactive sample is given by :  The amount of sample left after 't' time…

Q: Carbon 14, with a half-life of 5700 years, is used to estimate the age of organic materials. What…

A: The expression for the half-life of carbon-14 is written as, Here, λ represents the decay constant…

Q: A sample of carbon-14 has been decaying for 22 920 years and is now 35,0 grams. (The half life of…

A: Given: Decaying year T = 22920 years, Present Mass of carbon-14 Nt = 35.0 g. Half life of C-14 T1/2…

Q: A radioactive substance disintegrates 1/64 of initial value in 60 s. The half-life of this substance…

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Q: the half-life of Uranium-238 is 4.46 × 109 years. If a sample of mass 10kg is thought to have formed…

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Q: A scientist discovers a new isotope, exponentialitium. The scientist sets aside 150 grams of…

A: The amount of time required to fall the amount of a radioactive element to half is called the…

Q: A sample of radioactive elements of decay to 25 porcent of its original number of radioactive…

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