If an initial sample of a radioactive material with a half life of 22 days contain 250 g of radioactive material, how much radioactive material will be left in the sample after 18 days.

Q: Potassium (40K) decays to Argon (40Ar) with a half-life value of 1.3 billion years. 40K is the…

A: This problem can be solved using radioactive decay concept.

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

A: Given: Mo=200 gM=23.0 gt=1 year = 365 days

Q: If a sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams, what is…

A: Initial value of radioactive isotopes = 200 gram.It reduces to amount 50 gram.Time taken to decay =…

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: 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 for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…

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Q: How long does it take for 70% of a given radioactive element to decay, given that its half-life is…

A: Given value--- Half life time = 8.04 days. We have to find--- How long does it take for 70% of a…

Q: A radioactive material has a half life of 4.6 minutes.  After 8.1 minutes, which percentage of the…

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Q: Radon-222 has a half-life of 3.8 days. What mass of radon-222 would have a decay rate of 2220 Bq?…

A: We use the formula of rate of decay to get the required values.

Q: A radioactive sample containing approximately 6.52×10¹3 radioactive nuclides has a half-life of 5730…

A: Radioactive nuclides are those nuclides that are unstable. This happens due to the mismatch between…

Q: If you start out with 20 grams of a radioactive material, and 4 hours later you have 5 grams of that…

A: Given data:  Initial amount of material (N0) = 20 g Time (t) = 4 hours Remaining amount of material…

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 certain radioactive element has a half life of 3 hours.  How many hours would pass during 4…

A: Half life for a radioactive material is the time taken by the material to radiate to it's half…

Q: Radioactive substances follow a specific law of decay. Namely, if you have a sample of some…

A: The given problem is based on radioactive decay and half life.  The given equation is 128

Q: A radioactive sample contains 1.55g of of an isotope with half a life of 3.8 days. How much of the…

A: Given data:  Original amount of substance (N0) = 1.55 g Half life (T1/2) = 3.8 days Time (t) = 11.4…

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

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Q: What percentage of a radioactive substance remains after  7.00 half-lives have elapsed?

A: Time=7 half life

Q: 17: A sample of U-235 started with 120 grams.  If the half-life of U-235 has a half-life of…

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Q: A rock sample contains two radioactive elements A and B, with half lives of 8000 and 16000 years…

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Q: Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of 15 cm.…

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Q: Only 85% of the initial amount of a certain radioactive material following exponential decay remains…

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Q: The half-life of a radioactive nuclide is 20 years. If a sample of this nuclide has an activity of…

A: Formula of radioactivity is as follows: I=I0e-λt…

Q: Radioactivity depends on the nucleus and not the atom or its chemical state. Why, then, is one…

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Q: The half-life of a radioactive isotope is 6.02 hours.  25.0 Grams of this isotope is needed for an…

A: Given the halt life of the isotope  The decay constant is

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

A: Given, The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10…