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Example Thorium has a half life of 1.913 y. A sample of Thorium has 3/8 th...
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. (a) If a sample...
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. (a) If a sample has a mass of 67 milligrams, find an expression for the mass after t hours. Q(t) = 67e-0.0011997 (b) How much will remain after 85 hours? (Round your answer to one decimal place.) 60.5 mg (c) When will the initial mass decay to 20 milligrams? (Round your answer to one decimal place.) 1008.3 x hr
Thorium (with half-life T1/2 = 1.913 yr. and atomic mass 228.0287 u) undergoes alpha decay and...
Thorium (with half-life T1/2 = 1.913 yr. and atomic mass 228.0287 u) undergoes alpha decay and produces radium (atomic mass 224.0202 u) as a daughter nucleus. (Assume the alpha particle has atomic mass 4.002603 u.) 1) What is the decay constant of thorium? (Note that the answer must be in units of hrs-1.) λ = 2) What percent of thorium is left after 200 days? 3) The energy released from the decay of 10 g of thorium is used to...
Please show your steps clearly. . The radioactive isotope Uranium-234 decays to Thoriu-230 with a half-life of T. Thorium 230 itself is also radioactive and decays to Radium-226 with a half-life of γ...
Please show your steps clearly.
. The radioactive isotope Uranium-234 decays to Thoriu-230 with a half-life of T. Thorium 230 itself is also radioactive and decays to Radium-226 with a half-life of γ and γ > τ Although Radium-226 is also radioactive its half-life is much longer than T and γ and here we assume that it is relative stable. Consider the scenario when we start with a certain amount of pure Uranium-234, because of this chain of decays, we...
Part c The half-life of thorium-229 is 7340 years (a) Compute the time required for a...
Part c
The half-life of thorium-229 is 7340 years (a) Compute the time required for a given sample to be reduced by a factor of 1000. (Round your answer to the nearest whole number.) 73,149 yr (b) Express your answer in part (a) in terms of half-lives. (Round your answer to the nearest whole number) 10 half-lives (c) Using half-lives as in Example 7(b), estimate the time required for a given sample for thorium-229 to be reduced by a factor...
8. The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of...
8. The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount of thorium-227 to decay?
If a radioactive isotope has half-life h, then the number of atoms in a sample is...
If a radioactive isotope has half-life h, then the number of atoms in a sample is given by a(t)=a-2-/h where ao gives the number of atoms in the sample at time 0. The radio active decay of carbon-14 leads to clever way of determining the age of fossils and remnants of plants and animals. When an organism dies, the radioactive carbon- 14 in it decays, with half of it gone in 5,730 years. a. Suppose a mummified cat has a...
A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left...
A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40 minutes ? 1/2 1/4 1/8 1/16 Which one is correct ?
8. Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely...
8. Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone? 9. 100.0 grams of an isotope with a half-life of 36.0 hours is present initially. How ma time will have elapsed when 5.00 grams remains? 131 (half-life = 8.040 days) to decay to 10. How long will it take for a 40.0 gram sample of 1-131 (half-life =...
Hydrogen-3 is radioactive and has a half life of 12.3 years. What percentage of a sample...
Hydrogen-3 is radioactive and has a half life of 12.3 years. What percentage of a sample would be left after 1.32 years? Round your answer to 2 significant digits.
Part A Explain the concept of half-life. Match the words in the left column to the...
Part A Explain the concept of half-life. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Reset Help third the time mass increasing rates The half-life of a radioactive ruclide is It takes for of the original parent nuclides in a radioactive sample The half-life can be used to determine radioactive part quarter the temperature Increase the mass deactivation rates to deactivate...
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. (a) If a sample has a mass of 67 milligrams, find an expression for the mass after t hours. Q(t) = 67e-0.0011997 (b) How much will remain after 85 hours? (Round your answer to one decimal place.) 60.5 mg (c) When will the initial mass decay to 20 milligrams? (Round your answer to one decimal place.) 1008.3 x hr
Please show your steps clearly.
. The radioactive isotope Uranium-234 decays to Thoriu-230 with a half-life of T. Thorium 230 itself is also radioactive and decays to Radium-226 with a half-life of γ and γ > τ Although Radium-226 is also radioactive its half-life is much longer than T and γ and here we assume that it is relative stable. Consider the scenario when we start with a certain amount of pure Uranium-234, because of this chain of decays, we...
Part c
The half-life of thorium-229 is 7340 years (a) Compute the time required for a given sample to be reduced by a factor of 1000. (Round your answer to the nearest whole number.) 73,149 yr (b) Express your answer in part (a) in terms of half-lives. (Round your answer to the nearest whole number) 10 half-lives (c) Using half-lives as in Example 7(b), estimate the time required for a given sample for thorium-229 to be reduced by a factor...
If a radioactive isotope has half-life h, then the number of atoms in a sample is given by a(t)=a-2-/h where ao gives the number of atoms in the sample at time 0. The radio active decay of carbon-14 leads to clever way of determining the age of fossils and remnants of plants and animals. When an organism dies, the radioactive carbon- 14 in it decays, with half of it gone in 5,730 years. a. Suppose a mummified cat has a...
8. Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone? 9. 100.0 grams of an isotope with a half-life of 36.0 hours is present initially. How ma time will have elapsed when 5.00 grams remains? 131 (half-life = 8.040 days) to decay to 10. How long will it take for a 40.0 gram sample of 1-131 (half-life =...
Hydrogen-3 is radioactive and has a half life of 12.3 years. What percentage of a sample would be left after 1.32 years? Round your answer to 2 significant digits.
Part A Explain the concept of half-life. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Reset Help third the time mass increasing rates The half-life of a radioactive ruclide is It takes for of the original parent nuclides in a radioactive sample The half-life can be used to determine radioactive part quarter the temperature Increase the mass deactivation rates to deactivate...
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