The half-life of radiogold is approximately 3 days. If 1.5 g of this has been administered to a cancer patient for therapy initially, how much of it remains after 9 days?

Q: The half-life of bismuth-210, 210Bi, is 5 days.(a) If a sample has a mass of 200 mg, find the amount…

A: Solution-  (a)-The half life periods of Bismuth-210 is 5days.the rate of decay of any substance…

Q: The gallium-67 nuclide is used in tumor diagnostic applications. This has a half-life of 78.2 hours.…

A: given, half life =  78.2 hours  time = 5.00 days

Q: A radioactive isotope has a half life of 98.9 minutes. How long will it take for the radiation from…

A: Given , Half life = 98.9 minutes Initial concentration = 325 pCi Time ,t = ?

Q: 1. A substance has a mass of 5 grams after decaying for 100 minutes. What was the mass of the…

A: Given that: Mass of substance left after decaying = 5 g Total time for decaying of substance = 100…

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

A: A radioactive decay follows the first order kinetics where the rate of the reaction depends on the…

Q: The half-life of radioactive chromium-51 is 28 days, If a sample of chromium-51 has a mass of 12.0…

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Q: Determine the half-life of a radionuclide if after 18 days the fraction of undecayed nuclides…

A: Half-life (t1/2) represents the amount of time at which the concentration of the radioactive nuclide…

Q: If the half-life of a parent material is 10 Ma, and about 88% (rounded) has decayed to daughter…

A:

Q: A substance has a half-life of 2.045 minutes. If the  initial amount of the substance was 132.8…

A: Given,  Half-life, t1/2  = 2.045 minutes Initial ammount, A0 = 132.8 gram

Q: Uranium-240 has a half-life of 14.1 hours (note this is NOT a fissionable isotope).  A country with…

A:

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Formula for radioactive decay is given as,

Q: A radioactive isotope has a half life of 17.4 minutes. How long will it take for the radiation from…

A: Half life is a time taken to half the concentration of the substance present. here , the radioactive…

Q: The half-life of Radium-226 is 1600 years. If 30 grams are left after 8,030 years, how many grams…

A: Radioactive decay follows first order kinetics.  k = 0.693/t0.5  Or, k = 0.693/1600 year^-1 =…

Q: Suppose that 10 units of beryllium are present in a living organism and that the half-life of…

A: Here i have calculated the age of material

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Half life of technetium - 99 is = 6 hours.  Let Take a sample of technetium - 99 having number of…

Q: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: Rate of a reaction determines the speed with which a reaction proceeds. First order reaction is a…

Q: A 2.00 gram radioactive substance undergoes decay.  After 60 minutes, 1.50 grams have decayed.  What…

A: Radioactive decay generally follows first-order kinetics and for first-order kinetics:…

Q: After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the half-life…

A: Amount of radioisotopes remaining = 112 of the initial amount Number of days taken for the decay =…

Q: Iodine-131, in a sodium iodide tablet, is used to measure the activity of the thyroid gland. If a…

A: Nuclear chemistry is a branch of chemistry which involved the study of reactions in the nucleus. The…

Q: Iodine-131 has half life of 9 days meaning that after every 9 days the amount of isotope is reduced…

A: The half-life of Iodine-131 is 9 days. Initial amount =10.0 g  Time = 18 days. 18 days means => 9…

Q: At the beginning of an experiment, a scientist has 228 grams of radioactive goo. After 135 minutes,…

A: Hi! there, since there are multiple questions posted. We are answering first question. If you need…

Q: A 450.0-mg sample of technetium-99m was used for a diagnostic test.  If technetium-99m has an…

A: Given - Initial amount=450.0mg Half life=4.8h Time=48h

Q: Carbon-14 Dating A wooden artifact from an ancient tomb contains 65% of the carbon-14 that is…

A: Given information is as follows; Half life = 5730 years Fraction remaining = 65% = 0.65 The given…

Q: 1.Element F has a quarter life of 10 hrs. If there are 925 milligrams remaining of element F after…

A: SOLUTION: A = AoE-KT  (First order reaction) Quarter life = 10Hours At quarter life A=3Ao/4 3Ao/4 =…

Q: A sample of coral has a carbon-14 content of 12.5% the value of living coral.  If the half-life of…

A: Given  Half life of Carbon - 14 = 5730 years Remaining amount   = 12.5 %  Time ( t ) = ?

Q: The half life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams…

A:

Q: A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (CPM)…

A: Given: Half-life = 5730 years [A]=10 cpm [A]0 = 40 cpm

Q: carbon as a piece of modern charcoal. How long ago was the tree burned to make the ancient charcoal?…

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Q: At a certain instant, 100 grams of radioactive substance is present. After 20 years, 99.76 grams…

A: The half-life is the time required to change the initial amount to half of the amount. It is denoted…

Q: A rock was dated using Carbon-14 (half life = 5730 years). If the percentage of the parent atoms…

A: Given data contains, Half-life of C-14 is 5730 years. Percentage of parent atoms is 12.5%. N0 is…

Q: Part 1.1. If a radioactive element has a half-life of 2.5 million years, the amount of parent…

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Q: Californium-244 has a half-life of 19.4 minutes. If a researcher has 3.50 mg of Californium-244, how…

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Q: A 85.0-mg supply of iodine-131, used in hospitals in the treatment of hyperthyroidism, was stored…

A:

Q: The half-life of copper-67 is 61 hours.  If an original sample contains 24 grams how many grams are…

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Q: 10. The 14C content of an ancient piece of wood was found to be one-sixteenth of that in living…

A: The question is based on the concept of carbon dating. We have been given the fraction of carbon…

Q: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: The basic formula for half life equations is A= amount remainingP= original amountt= elapsed…

Q: How many milligrams remain of a 15.0 mg sam- ple of radium-226 after 6396 years? The half-life of…

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Q: 21. Half-Life The half-life of radium-226 is approximately 1620 years. a. How much of a sample…

A: Introduction: We know that this decay of radioactive elements is a type of first-order reaction. The…

Q: A radioactive isotope has a half life of 83.3 minutes. How long will it take for the radiation from…

A:

Q: The half-life of carbon-14 is 5730 years. The wrapping of an Egyptian mummy gave off 3.8 counts per…

A: From the given data we haveHalf life of carbon-14=5730 yearsWrapping of mummy=3.8…

Q: A substance X initially weights 56 grams. After 6 minutes, it was observed that its mass decreased…

A: Mass at starting (t=0) = 56 grams Mass after 6 min = (56-12) g                                = 44 g…

Q: The half life of a specific radionuclide is 8 days. How much of an 80mg sample will be left after 24…

A: There are two methods to solve it : Method (1): The half life is the time in which any compound is…

Q: True or false? During one half-life, the mass of a radioisotope is reduced by half. Explain.

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Q: An 80-mg sample of technetium-99m is used for a diagnostic test. If Tc-99m has a half-life of 6.0…

A: Given  Initial Amount of Sample (A)0 = 80 mg  Half life ( t1/2 )  = 6 hour Time ( t )   = 24 hour…

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

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Q: The half-life of a given radioactive substance is 2.5 minutes. What fraction of the original…

A: Given, half-life , t1/2 = 2.5 min                     and, t = 10 min We need to calculate the…

Q: If 1.50 gram of a 2.00 gram sample of a radioactive substance undergoes decay in 60 minutes, then…

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Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

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Q: Strontium-89 is a beta emitter with a half-life of 50.6 days that is used in bone cancer treatment.…

A: Radioactive decay follows first order kinetics. t1/2 = 0.693/k   (where, k = decay constant) t =…

Q: The cesium-137 has a half life of 30 years after 90 years about 10g.remains. the original mass of…

A:

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.