A certain radioactive element has a half life of 3 hours.  How many hours would pass during 4 half-lives? Group of answer choices A: 6 hrs B: 15 hrs C: 18 hrs D: 12 hrs E: 9 hrs

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

A: Calculate the decay constant of the radioactive nuclei. A=A0e-λt2×1010 Bq=1×1011 Bq×e-λ×10 he-λ×10…

Q: The half-life of krypton-91 ("Kr) is 10 s. At time t = 0 a heavy canister contains 3 g of this…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: 8..At-219 is a nuclide produced during the decay of U-235, and At-219 in nature is estimated to be…

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Q: Bismuth, 214Bi decays by alpha decay with a half-life of 19.7 minutes. What is its decay constant?…

A: Formula of half-life of radio active element is as follows: T12=0.693λ…

Q: If the half-life of Uranium 235 is 700 million years, what would its third-life be?

A: Given data: The half life of Uranium 235 is t1/2=700 million years.   The expression for the…

Q: If 100 grams of a radioactive substance is left to decay, how much would be left after 5 half-lives?…

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Q: Material found with the body had a C-14 activity of about 0.215 Bq per gram of carbon, where the A0…

A: The half life is t1/2=5730 yrs

Q: certain radioactive isotope has a half-life of 4.0 hours. How much time does it take for the amount…

A: Half life = t = 4 h let the time taken in measure of no. of half lives taken to decrease be n…

Q: A radioactive source consists of 6.4 x 10^11 atoms of a nuclide of a half-life of 2 days. A second…

A: According to question we need to find--- After how many days will the number of radioactive atoms…

Q: The half-life of radio-active isotopes is 140 days. How many days would it take for the activity of…

A: Given data: the half life of radio-active isotope, t1/2 = 140 days

Q: The half-life of 60 Co is 5.27 years. The activity of an 60 Co sample is 3.70x10° Bq . You may want…

A: The disintegration constant is given by  λ =0.693T where, T is the half life.

Q: A certain radioactive material has a half-life of 8 minutes. Suppose you have a large sample of this…

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Q: The half-life of carbon-14 is 5730 yrs. Find (a) its decay constant __________s-1 (b) the initial…

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Q: After 32 days, only 1/16 of a radioactive sample remains. What is the half-life of this sample?…

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Q: If two grams of a radioactive isotope has a half - life of twenty hours, the half life of one gram…

A: half life of two grams of a radioactive isotope = 20 hours

Q: While exploring a coal mine, scientists found plant fossils which had been preserved by an…

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Q: What is "half-life"? Select one: a. The time needed for half of the radioactive atoms in a sample to…

A: Half-life is the duration of time needed for decay of the half of the radioactive atoms in a given…

Q: What fraction of a radioactive sample remains after (a) one, (b) two, and (c) three half-lives have…

A: a)Fraction of material left after one half life is,

Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…

A: a) Calculate the decay constant. N(t)=Noe-λt λ=1tlnNoN Substitute the values. λ=1365 daysln200 g7.1…

Q: Three quarters of nuclie in a given radioactive sample decays in 2 weeks. What is the half life of…

A: we have to find half life of the sample, in the given question.

Q: Bismuth, 214Bi decays by alpha decay with a half-life of 19.7 minutes. What is its decay constant?…

A: Given:Bismuth, 214Bi decays by alpha decayHalf-life,t1/2= 19.7 minutes.Find  its decay constant.Now,…

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

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Q: For the radioactive isotope strontium-90, k is 2.47 x 10-2 years -1. If the original amount of…

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Q: Given a half-life of a radioactive source is 435 years. Calculate the time taken for its activity to…

A: Half life of a radioactive substance is given. We are Required to calculate the time it takes for…

Q: Cobalt 60 is a γ emitter with a half-life of 5.27 years and a γ energy of 1.3 MeV. What is the…

A: Given data:  half life of cobalt = 5.27 years energy given = 1.3 MeV

Q: The half-life of radon is 3.8 days. Calculate the number of disintegrations per second of 2.5 g of…

A: half life of radon = 3.8 days  = 3.8 * 86400 sec  = 328320 seconds Decay constant = 0.693/ half life…

Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…

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Q: If the parent isotope starts with 100 grams, but your samples yield only 12.5 grams of the parent…

A: Given Data Initial mass of sample is M= 100 g Final mass is m = 12.5 g

Q: nuclear/ radioactive decay may be best expressed as Group of answer choices N = No e-1/λλt No = N…

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Q: Uranium-lead (U-Pb) dating of geological samples is one of the oldest and most refined radiometric…

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Q: The half-life of this nucleus is 1.0 seconds. For the following times fill in the rest of the chart…

A: Given  half life=1 sec required parent and daughter nuclei at given time

Q: An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 30% more of…

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Q: (19) Remains recovered in a tomb are found to have 72% of its Carbon-14 remaining.  How old might…

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Q: A patient is injected with a radioactive isotope with a radiological half life of 12 days. The…

A: Option: A

Q: A radioisotope has a half-life of 5.0 days. The activity of a radioisotope sample prepared ten days…

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Q: Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio…

A: In this question we have to find the age of the rock in years. Please give positive feedback if the…

Q: , how old is a sample if two-thirds of it is now the daughter isotope? What type of decay is…

A: We know , N=N0e-λt Where, N= remaining part of the sample N0=Initial amount of the sample λ=decay…

Q: The radioactive glucose used in PET scans has a half-life of approximately 2 hours. How much of the…

A: Half life (t) of radioactive glucose= 2 hours Time period (T) = 8 hours Let the original amount of…

Q: You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly…

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

A:

Q: In the table below, the 2-H is called Deuterium; its Atomic Mass is 2.014102. Which choice below is…

A: Mass of Deuterium is given as = 2.014102 No of protons in hydrogen 1 = 1

Q: Bismuth, 214Bi decays by alpha decay with a half-life of 19.7 minutes. What is its decay constant?

A: Half life  = t = 19.7 minutes  I minutes = 60 sec  So t = 60*19.7 t =1182 sec  The decay constant is…

Q: The isotope Carbon 14 decays by β emission and has a half-life of 5730 years. The carbon in living…

A: This question can easily be solved by applying the concept of radiocarbon dating .

Q: The half life of radium is 1.62x10^3years. What fraction of radium would remain after 1.0x10^3years?…

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Q: How many protons and how many neutrons does each of these isotopes of radon contain? (a) Rn­-210…

A: Isotopes are the elements which contains same atomic number or number of protons but different mass…

Q: The half-life of a radionuclide is 26.4 years. The time required for a 48.0 gram sample of this…

A: Write the given values of the problem- Half life of a radio nuclide=26.4 years Mass of given…

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.