1) A radioactive sample reduced to 10% of its initial value in 10 hours. Calculate the half life of the sample.
Q: Consider an electric circuit containing a capacitor, resistor, and
A: Given: RC circuit:
Q: When we talk about radioactive decay, we often talk about a half-life, i.e. the amount of time it…
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Q: 2. An isotope of sodium 24N a has a half-life of 15 hours. A sample of this isotope has a mass of…
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Q: (a) Define the term decay constant of a radioactive substance. 92 (b) The half-life of 238U…
A: We are aware that U92238 a degradation has a half life of 4.5×109 years.We must determine the…
Q: The probability that a randomly chosen nucleus in a radioactive sample will have decayed in a given…
A: Sample of radio active nucleus decayed = 96.875 %
Q: After 2.14 days, the activity of a sample of an unknown type radioactive material has decreased to…
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Q: ii) The half-life of a radioactive element is 20 days. Calculate the time taken for the number of…
A: Given Data : Half life of element, t1/2 = 20 days Number of nuclei left = 40% of initial value…
Q: 5. How many nuclei of 238 U remain in a rock if the activity registers 270 decays per second? (Note…
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Q: 2. Consider a radioactive substance with a half-life of H = 25 days. Suppose mo = 50 mg is the…
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Q: A radioactive sample is observed for 160 days. After 160 days the amount of the sample is found to…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: 9) How many half-lives are required for the number of radioactive nuclei to decrease to…
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Q: 6. The radioactive isotope (191 Pt) has a half-life of 2.86 days. A sample containing this isotope…
A: Given, The half-life of radioactive, t1/2=2.86days Initial activity, A0=4.5×108Bq The decay…
Q: Q1(i). The half-life of 20kg of Bismuth-210 is 20 minutes. Explain this statement. (ii). A…
A: (i) Given: Mass of Bi-210 is 20kg. The half life is 20min. Explanation: Half life is the time…
Q: The half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. s -1…
A: Given data: The half life of randon-222 is t1/2=3.823 days=330307.2 s Part a: The expression for…
Q: Choose the BEST answer to the following. A radioactive sample has a half-life of 1 hour. Starting…
A: The number of half -life passed in a time is,
Q: A radioactive sample is observed for 5 days. After 5 days the amount of the sample is found to be…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: v) Check Question 5: Radioactivity (See textbook Chapter 6 - Exercise 4) Natural uranium is a…
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Q: Can carbon-14 dating be used to measure the age of a rock? Explain.
A: Carbon dating is a method which is used to find age of objects younger than 50,000 years.
Q: Which expression correctly describes the radioactive decay of a substance whose half-life is T?
A: Radioactive decay is given by , Nt = N0e-λt And rate constant λ = ln2t1/2 = ln2T
Q: When a nucleus decays by emitting an alpha particle, what is the atomic number of the resulting…
A: Given: 88 Ra226
Q: 53. A radioactive sample contains 3.50 µg of pure "C, which has a half-life of 20.4 min. (a) How…
A: Given data: Mass, m=3.50μg=3.5×10-6g Half-life, t12=20.4 min=20.4×60 s=1224 s
Q: 1. The decay of radioactive substance is given by -t T N = Nᵒe (1), where N is the number of atoms…
A: You are using incorrect symbol for Tau (decay constant).
Q: A hazardous material was found to decay at a rate proportional to the amount present. Initially,…
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Q: In a lab a radioactive sample is studied for 5 days. It was observed that the radioactive nuclides…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The decay process is…
Q: 37 184 H.W: Preparing a pure sample of a radioisotope of argon 1Ar containing 2.5x1016 nuclei. After…
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Q: 10.)A radioisotope has a half-life of 5.0 days. The activity of a radioisotope sample prepared ten…
A: half life (t1/2) = 5 days Activity (A) = 6400 Bq time = 10 days
Q: Which of the following statements is true? a. The activity per unit mass of a radionuclide is termed…
A: The second statement is true as this is the law of radioactivity. dN/dt is directly proportional to…
Q: The half-life of a radioactive isotope is known to be exactly 1 h. a) What fraction of a sample…
A: Given in question - Half-life (T) = 1 hour Solution: Step1 - Here we will understand the concept…
Q: Gallium-67, used in the medical diagnostics of certain types of tumors, has a nuclear half-life of…
A: Given: Nuclear radioactive half life = tr = 78.25 hours Biological half life = tb = 11.6 days…
Q: A sample of a radioactive isotope is placed near a Geiger counter, which is observed to register 160…
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Q: 29) Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount…
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Q: A hazardous material was found to decay at a rate proportional to the amount present. Initially,…
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Q: Complete the following radioactive decay formulas: a) 12 5 B->___+e-+V b) 284 90 Th->250 88…
A: b)90284Th→88250Ra+___This equation describes an alpha decay, where an alpha particle, which is a…
Q: 8. The half-life for a radioactive isotope is 4.00 × 10⁹ yr. Determine the age (in years) of a rock…
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Q: Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample of initially pure iodine-131…
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Q: 235U is radioactive, with a long half-life of 704 million years. The decay products of a 235U…
A: 235U92 has the half-life of 704 million years. But decay products of 235U92 have half-lives of a few…
Q: A radioactive sample has a half-life of 28 mins. If the initial amount of sample was 2 g, estimate…
A: Radioactive decay takes place when an atomic nucleus becomes unstable. The rate of decay is known as…
Q: A sealed box was found and contained an alloy composed of equal parts by same weight of two metals A…
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Q: 6) A sealed box was found and contained an alloy composed of equal parts by same weight of two…
A: Let No be the initial amount of each metal and Y be its age. Thus, the no. of half-lives is given…
Q: A radioactive sample has a decay of 0.2193/min. a) What is the half-life? b) If at the start of an…
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Q: The half-life of radon-222 is 2.8 days. How many days would it take for the activity due to radon in…
A: Given that:- Half life of radon-222=2.8 days
- Radioactive decay is the process by which an unstable nucleus attains stability by releasing radiations. They become stable by removing protons or neutrons. The rate of decay is called activity.
- This decay will be exponential in nature and is given by,
Here N0 is the original number of radioactive nuclei present, t is the time, and t1/2 is the half-life of the radioactive sample. This is known as the exponential law of radioactive decay.
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