element
Q: After 1.82 days, the activity of a sample of an unknown type radioactive material has decreased to…
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Q: Madame Curie filled glass vials with pure radon, produced by her radium, for use in hospitals. Radon…
A: Let us analyse the question in step 2.
Q: 1. Calculate the binding energy (in MeV) per nucleon for an a-particle (He nucleus), given that the…
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Q: After 2.14 days, the activity of a sample of an unknown type radioactive material has decreased to…
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Q: The graph below shows the decay of a sample of 14C that initially contained No atoms. Decay Plot No…
A: Half-life is the time taken to disintegrate half of the initial concentration.
Q: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…
A: According to the data given Half life is 3hr And relationship given is . N(t) = N0 e(-t/£)
Q: Strontium is chemically similar to calcium and can replace calcium in bones. The radiation from ⁹⁰Sr…
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Q: Two radioactive nuclides, A and B, are presented at t = 0 with the number of nuclei of A equal twice…
A: At , t = 0 , the number of A nuclei is twice the no of B nuclei. Na(0) = 2× Nb(0) The lifetime of…
Q: 9. The radioactive isotope (82Sr) has a half-life of 25.4 days. A sample containing this isotope has…
A: The radioactive isotope is Half-life time of radioactive element is The initial activity is…
Q: purchased by a medical supply house. If the sample has a half-life of 14 d, how long will it keep…
A: Just replace the values .... An its done
Q: Qc
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Q: A particular radioactive sample undergoes 2.50××10^6 decays/s. a) What is the activity of the…
A: In the given question , We have to determine the values of given parts.
Q: What is the half-life in days of a radioactive sample with 3.0x1015 atoms and an activity of 6.2x108…
A: In this problem, we are given the number of atoms in a radioactive sample (N = 3.0x10^15 atoms) and…
Q: Given the mass of a radioactive material, phosphorus 32P is 0.60 g and its half-life, T1/2 is 14.3…
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Q: Co decays with a half-life of 5.27 years to produce 8 Ni. 60 (a) What is the decay constant for the…
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Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 3.30 ✕ 1011 Bq when…
A: Given. N = 1.7*10¹⁵ dN/dt = 3.3*10¹¹ Formula used N(t) = N⁰*0.5t/T Where T is half life
Q: A. B. Use the worked example above to help you solve this problem. The half-life of the radioactive…
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Q: Uranium-235 (2U) undergoes a series of alpha and beta decays in this succession: a, 2B, 5a, 2B, and…
A: Alpha Decay Alpha particle contains two protons and two neutrons, after an alpha emission the parent…
Q: Problem 8: In a living organism, a fixed fraction 1.30 × 10-12 of 12C is the radioactive isotope…
A: Given data: fixed fraction =1.30 × 10-12 of 12C Need to determine the numeric value is expected.
Q: A 200.0 - mCi sample of a radioactive isotope is purchased by a medical supply house. If the sample…
A: The time taken for the activity reduced to 20.0 mCi.
Q: 3) Fill the missing and decide the type of decay in the following decays: 60 60 a) Co* → []+ 29 Co…
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Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.19 kg…
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Q: A.) Natural potassium contains 40K, which has a half-life of 1.277 ✕ 109 y. What mass of 40K in a…
A: Decay Rate: The independent variable that is determined by taking the reciprocal of mean of a…
Q: The radium isotope 226 Ra has a hall-life of 1600 years. A sample begins with 3.50x1010 226 Ra atoms…
A: The half-life of 226Ra is T1/2 = 1600yr and the Initial amount is N0 = 3.50 x 1010
Q: A wood artifact discovered in 1990 showed a 14C-activity equivalent to 43% of that found in the…
A: Given : Half life of C-14, t1/2 = 5730 years Let initial count of C-14 be N = 100 The count of C-14…
The element 144X transforms into a 140Y nucleus by alpha decays radioactive.
a) Calculate the activity of 144X radioactive element with a half-life of 8 years and a core number of 5x1013 in Bq.
b) What is the mass of element 144X that has radioactivity in a.
c) Assuming that 144X and 140Y nuclei are in permanent equilibrium and the initial activity of 140Y nuclei is 7x1015 Bq, what is the current mass of 144Y nuclei on.
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- A certain isotope has a half-life of 5.9 h and an atomic mass of 95.98 u. What will the activity in Bq of a 1.36-g sample be after 19.8 h?Madame Curie filled glass vials with pure radon, produced by her radium, for use in hospitals. Radon has a short half-life of 3.8 days. Suppose that she put 1 MBq of radon in a vial. i) Sketch a graph of the activity of the radon over the next week or two. Label the axes with appropriate numbers and units. Mark on the graph the half-life and the characteristic time. ii) Radon decays through a chain of four very short-lived radionuclides (halflives of 20 minutes and less) before reaching a relatively stable isotope of lead. Approximately what activity will the vial have two or three hours after filling, and about two weeks after filling?An unstable isotope of cobalt, 60Co, has one more neutron in its nucleus than the stable 59Co and is a beta emitter with a half-life of 5.30 years. This isotope is widely used in medicine. A certain radiation source in a hospital contains 4.20×10−2g of 60Co A) What is the decay constant for that isotope? Express your answer with the appropriate units. B) How many atoms are in the source? C) How many decays occur per second? Express your answer as a number of decays per second. D) What is the activity of the source, in curies? Express your answer in curies.
- Radioactive potassium-40 has a half-life of 4.2 x 1016 s. a) Calculate the decay constant of potassium-40. b) A sample of potassium-40 has an initial mass of 1.0 g. Calculate the number of parent nuclei present in the sample, as well as the initial activity of the source. (One mole of potassium-40 has a mass of 40 g and NA = 6.0 x 1023 mol-1) c) Calculate the number of parent nuclei present in the sample after 9.2 x 1016 s.H.W 2 A tiny piece of paper (produced from formerly living plant matter) taken from the Dead Sea Scrolls has ar activity of 10.8 disintegrations per minute per gram of carbon. If the initial C-14 activity was 13.6 disintegrations/min/g of C, estimate the age of the Dead Sea Scrolls.There is more than one isotope of natural uranium. If a researcher isolates 0.7 mg of the relatively scarce 235U and finds this mass to have an activity of 78.0 Bq, what is its half-life in years? =___years
- An 8 g sample of a radioactive element takes 8.42 million years to reduce into 2 g. Calculate the half-life and identify the element.I need the answer as soon as possibleThe amount of radioactive 40K in a 70kg person is approximately 5000Bq. A) what is the number (N) of radioactive 40K nuclei in the body? The half life of 40K is 1.25x109 years. B)What is the amount of natural potassium (in grams) in the body? The abundance of 40K is 0.012% of the natural potassium 39K