Calculate how long it will take for a sample of 234TH with a half-life of 24.1 days to decay to 6.0% of its original value. 62 days 98 days 1.6 days 400 days O 0.12 days

Q: The half-life of Phosphorus-32 is 14.3 days. If you start with 100 grams of it, how long will it…

A: Half life of a first order reaction is given by , t1/2=0.693k Write the expression for first order…

Q: The half life of an isotope is 43 seconds.  How long does it take 100.00 g of that isotope to decay…

A: Given that  Initially weight of isotope sample = 100.0 gm initially number of atoms of isotope No=…

Q: The half-life of strontium-90 is 28 years. H

A: Given t1/2 of a reaction is 28 years  decay constant  (λ) λ = 0.693t1/2     = 0.69328 y     =…

Q: A particular isòtope of an element has a half-life of 75.0 hours. What percentage of the sample will…

A: All isotopic decomposition follows the first order reaction kinetics. So using integrated rate…

Q: Radium 223 decays with a half life of 11.4 days. How long will it take for a 0.240mol sample of…

A: Half life of radioactive elements is given by    t1/2 =0.693λ      λ = disintegration constant.…

Q: If the amount of radioactive phosphous-32 in a sample decreases from 1.2 g to 0.30 g in 28.6 days,…

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Q: Bromine-82 is used to study the flow and distribution of waste water. A sample contains 0.500 mg of…

A: The objective of this question is to calculate the half-life of Bromine-82 (Br-82) using the given…

Q: llium-201 is used medically to diagnose heart problems. The half-life of llium-201 is 72.9 hours. If…

A: Half life= 72.9 hour  Initial amount= 40.5 mg  Time (t) = 187 hour

Q: What is the half life of a radioactive sample , if 3/4 of its nuclei decay in 2 years ?

A: Given:The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass =…

Q: Calculate how long will it take for a sample of a radionuclide with a half-life of 30.9 days decay…

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Q: How long for Ce-144 (half-life: 280 days) to decay down to 0.50% of its original amount?   2,100…

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Q: 210Rn has a half-life of 2.4 hours. You have a sample that contains 24 g of 210Rn. How much 210Rn…

A: The relationship between the half-life, T1/2 and the decay constant is given by  or,  The…

Q: You have a sample of Bismuth-212 to prepare for an upcoming medical test.  This isotope has a…

A: The radioactivity follows first-order kinetics. The half-life relates to the rate constant, k for…

Q: Oxygen-15 is an isotope of oxygen that is used in the medical procedure called a PET scan. The…

A: Given that, the half-life of oxygen-15 is t1/2 = 2 min. A hospital needs 1 g of oxygen-15. The…

Q: e uranium decay series from U-238 to stable lead (Pb-206) is: U → 234Th → 234Pa → 234U → 230 Th →…

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Q: The half-life of 14C is 5730 years. A sample contains 92.4% of the 14C it would contain if it were…

A: The age of the old fossils can be find out by using carbon dating method.  So the amount of 14C…

Q: Potassium ion is present in foods and is an essential nutrient in the human body. One of the…

A: 40-K , undergoes decay by three modes : 1. Positron emission ( it is emission of beta+ particle),…

Q: Thallium-208 has a half-life of 3.053 min. How long will it take for 120.0 grams to decay to 10.0…

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Q: 90 The half-life of "Sr is 28 years. How long will it take for a given sample of "Sr to be 83%…

A: 1) half life = 28 years  Decomposed = 83 %  2) half life = 39.4 days

Q: Bismuth-209 has a half-life of 2.01 x 1019 years.  How long will it take for 6.92 kg of bismuth-209…

A: We have to predict the time taken.

Q: Lead-200 has a half-life of 21.5 hours. Starting with 1.96 mg of this isotope, how much O 0.110 mg…

A: We will use first order kinetics formula

Q: The isotope 22288Rn has a half-life of 3.8 days. How long does it take for 0.050 mmol to decay to…

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Q: Half life iridium 192 is 106.51 days. How many days are required for 60 mg to decay to 7.5 mg

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Q: The half-life of a radioactive element is 8 days. How long will it a 1.0 g sample to decay to 0.0625…

A: Radioactive decay is the process of breakdown of radioactive matter. The atomic nucleus is broken…

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A: Since the decay reactions are first order reaction. Hence for the first order reactions we can say…

Q: The half life of Fr is 19 minutes. How many minutes will it take for a given amount of this…

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Q: Radon has been the focus of much attention recently because it is often found in homes. Radon-222…

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Q: Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.20…

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Q: An element X has a half-life of 5250 years. It’s originally found in a fossil and weighs 12g. How…

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Q: Iodine-131 has a half-life of 8.0 minutes. How many half-lives will pass in 120 minutes?

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Q: A particular isotope of an element has a half-life of 56 days. What percentage of the sample will…

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.