Uranium-238 has 20% alpha decay and 80% beta decay. Its overall half life is 1 hour....
Uranium-238 has 20% alpha decay and 80% beta decay. Its overall half life is 1 hour. What is the half life for the alpha decay.
(These numbers are completely made up. I'm just trying to understand how to do these types of questions)
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Uranium-238 has 20% alpha decay and 80% beta decay. Its overall
half life is 1 hour....
(d) Due to alpha decay, l mole of uranium-238 produces 2.96 106 alpha particles per second. Find the half-life, giving...
(d) Due to alpha decay, l mole of uranium-238 produces 2.96 106 alpha particles per second. Find the half-life, giving your answer in units of years. [5 marks] (e) The average mass of the atoms in a 0.100 kg block of pure carbon is 12.01 u. A small fraction of the atoms are radioactive, with a decay constant of 3.90 x 10-12s. If the activity of the carbon block is 97.8 Bq, calculate what fraction of the atoms are radioactive...
AU-238 atom undergoes alpha decay. The daughter atom then undergoes beta minus decay into a second...
AU-238 atom undergoes alpha decay. The daughter atom then undergoes beta minus decay into a second daughter atom. What is the second daughter atom? 0 U-235 Th-238 Th-234 O Pa-234 O Rn-222 Question 20 AU-238 atom (uranium-238) has a nucleus with 92 protons and an atomic mass of 238.0507882 u. What is the nuclear binding energy per nucleon in this atom? O 1.93 MeV 0 7.57 MeV O 12.3 MeV O 19.6 MeV O 1802 MeV
You are dating Moon rocks based on their proportions of uranium-238 (half-life of about 4.5 billion...
You are dating Moon rocks based on their proportions of uranium-238 (half-life of about 4.5 billion years) and its ultimate decay product, lead. a)Find the age for a rock for which you determine that 59% of the original uranium-238 remains, while the other 41% has decayed into lead. b)Find the age for a rock for which you determine that 71% of the original uranium-238 remains, while the other 29% has decayed into lead.
(1 point) A Uranium-238 nucleus (U-238) decays to a Thorium-234 (Th234) by emitting an alpha particle...
(1 point) A Uranium-238 nucleus (U-238) decays to a Thorium-234 (Th234) by emitting an alpha particle (i.e. a Helium-4 nucleus): 1,228 +Th%d4 + He A Uranium nucleus has 92 protons in it while a Helium nucleus has 2 protons. The mass of a Helium nucleus is 6.645 x 10-27 kg. For this problem assume that the Uranium nucleus is initially at rest and the Thorium nucleus remains at rest after the decay. If the alpha particle is initially at rest...
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010...
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010 years. Calculate the age of the fossil if (5.7x10^1)% of rubidium-87 remains in the sample. Report your answer with 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 Answer units Question 2 (1 point) Thallium-201 is used to diagnose heart disease. The half-life of thallium-201 is 72.9 hours. If a patient takes 7.7 ug,...
1. A U-238 atom (uranium-238) has a nucleus with 92 protons and an atomic mass of...
1. A U-238 atom (uranium-238) has a nucleus with 92 protons and an atomic mass of 238.0507882 u. What is the nuclear binding energy per nucleon in this atom? 2. When Dr. Bruce Banner becomes angry and undergoes a transformation into the Incredible Hulk, his blood plasma becomes saturated with Na-24 atoms. These radioactive sodium atoms decay into stable Mg-24 by beta decay, along with the release of two high-energy gamma rays, to which Dr. Banner is immune. After initially...
Calculating Absolute Ages: Daughter Isotope Lead-210O Polonium-218 Xenon-131 Yttrium-90 Nitrogen-14 Uranium-235 Thorium-231 Thorium-234 Half Life [approximate]...
Calculating Absolute Ages:
Daughter Isotope Lead-210O Polonium-218 Xenon-131 Yttrium-90 Nitrogen-14 Uranium-235 Thorium-231 Thorium-234 Half Life [approximate] 0.00016 seconds 4.0 days Type of Decay Parent Isotope Polonium-214 Radon-222 lodine-131 Strontium-90 Carbon-14 Plutonium-239 Uranium-235 Uranium-238 Alpha Beta Beta Beta 8.0 da 30.0 years 5,730 years 24,000 years 704,000,000 years 4,500,000,000 years Alpha Alpha A meteorite from Mars is found on the surface of a glacier in Antarctica. You take it back to the lab and measure 96.875 grams of Thorium-231 for every...
7. anium-238 is an alpha-emitter with a half-life of 4.522 x 10 years and an isotope...
7. anium-238 is an alpha-emitter with a half-life of 4.522 x 10 years and an isotope mass of 238.0508 g/mol. This isotope is useful for dating geological samples. A rock from the ocean floor contains 0.4203 g Uranium-238. What is the activity of this rock (from 238U) in counts per minute? Show all of your work. 8. Scientists exploring the new element Covidium (Cv) discover it has various isotopes. Calculate the binding energy per nucleon in units of kJ for...
Q24,25 xplou how naturally occurring ratct towp inside Earth produce geothermal Ex energy 23. Uranium-235 has a much...
Q24,25
xplou how naturally occurring ratct towp inside Earth produce geothermal Ex energy 23. Uranium-235 has a much shorter half-life than uranium-238. These two isotopes occurred in equal abundance when Earth was formed. Compare their relative abundance today 4. A radioactive tracer used in a medical test has a half-life of, 2.4 h. What fraction of this tracer will remain after 12 h? 25. An archaeologist finds a wooden arrow shaft vith a proportion of carbon-14 that is about 25...
A sample of 9.0×109 atoms that decay by alpha emission has a half-life of 90 min....
A sample of 9.0×109 atoms that decay by alpha emission has a half-life of 90 min. How many alpha particles are emitted between t=50min and t=200min? Express your answer using two significant figures.
(d) Due to alpha decay, l mole of uranium-238 produces 2.96 106 alpha particles per second. Find the half-life, giving your answer in units of years. [5 marks] (e) The average mass of the atoms in a 0.100 kg block of pure carbon is 12.01 u. A small fraction of the atoms are radioactive, with a decay constant of 3.90 x 10-12s. If the activity of the carbon block is 97.8 Bq, calculate what fraction of the atoms are radioactive...
AU-238 atom undergoes alpha decay. The daughter atom then undergoes beta minus decay into a second daughter atom. What is the second daughter atom? 0 U-235 Th-238 Th-234 O Pa-234 O Rn-222 Question 20 AU-238 atom (uranium-238) has a nucleus with 92 protons and an atomic mass of 238.0507882 u. What is the nuclear binding energy per nucleon in this atom? O 1.93 MeV 0 7.57 MeV O 12.3 MeV O 19.6 MeV O 1802 MeV
(1 point) A Uranium-238 nucleus (U-238) decays to a Thorium-234 (Th234) by emitting an alpha particle (i.e. a Helium-4 nucleus): 1,228 +Th%d4 + He A Uranium nucleus has 92 protons in it while a Helium nucleus has 2 protons. The mass of a Helium nucleus is 6.645 x 10-27 kg. For this problem assume that the Uranium nucleus is initially at rest and the Thorium nucleus remains at rest after the decay. If the alpha particle is initially at rest...
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010 years. Calculate the age of the fossil if (5.7x10^1)% of rubidium-87 remains in the sample. Report your answer with 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 Answer units Question 2 (1 point) Thallium-201 is used to diagnose heart disease. The half-life of thallium-201 is 72.9 hours. If a patient takes 7.7 ug,...
Calculating Absolute Ages:
Daughter Isotope Lead-210O Polonium-218 Xenon-131 Yttrium-90 Nitrogen-14 Uranium-235 Thorium-231 Thorium-234 Half Life [approximate] 0.00016 seconds 4.0 days Type of Decay Parent Isotope Polonium-214 Radon-222 lodine-131 Strontium-90 Carbon-14 Plutonium-239 Uranium-235 Uranium-238 Alpha Beta Beta Beta 8.0 da 30.0 years 5,730 years 24,000 years 704,000,000 years 4,500,000,000 years Alpha Alpha A meteorite from Mars is found on the surface of a glacier in Antarctica. You take it back to the lab and measure 96.875 grams of Thorium-231 for every...
7. anium-238 is an alpha-emitter with a half-life of 4.522 x 10 years and an isotope mass of 238.0508 g/mol. This isotope is useful for dating geological samples. A rock from the ocean floor contains 0.4203 g Uranium-238. What is the activity of this rock (from 238U) in counts per minute? Show all of your work. 8. Scientists exploring the new element Covidium (Cv) discover it has various isotopes. Calculate the binding energy per nucleon in units of kJ for...
Q24,25
xplou how naturally occurring ratct towp inside Earth produce geothermal Ex energy 23. Uranium-235 has a much shorter half-life than uranium-238. These two isotopes occurred in equal abundance when Earth was formed. Compare their relative abundance today 4. A radioactive tracer used in a medical test has a half-life of, 2.4 h. What fraction of this tracer will remain after 12 h? 25. An archaeologist finds a wooden arrow shaft vith a proportion of carbon-14 that is about 25...
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