The time it takes for half of a radioisotope's atoms to decay (like Carbon-14) ___.   is used to construct the geologic time scale   cannot be calculated   is its half-life   is the same for uranium 238 and carbon 14   is highly variable

Q: Radioactive decay is typically second order. True or False. Why? Specify equations, if any.

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Q: The half-life of the radioactive isotope astatine-218 is 2.00 seconds. How long will it take for the…

A: all radioactive reactions are first order.  Here first calculate the rate constant with the help of…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

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Q: Use your knowledge obtained while studying nuclear reactions to explain how the rate of decay of a…

A: The half-life of the given radioactive reaction is the time at which the reactant is disintegrated…

Q: Understanding radioactive half life A medical technician is working with the four samples of…

A: The initial radioactivity of a sample is inversely proportional to the half-life. A shorter…

Q: Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed…

A: Amount of Iridium - 192 given = 5.25 g = A° The standard half-life of Iridium - 192 = 74 days

Q: what percentage of the strontium-90 that was made 1945 still exsist now in the year 2021? the…

A: Given , Strontium -90  half life t1/2=28.9 initial concentration (concentration in 1945) = CA0 final…

Q: Understanding radioactive half life A medical technician is working with the four samples of…

A: To solve this problem, we need to perform the following tasks:Order the samples by decreasing…

Q: A shell fossil that originally contained 100 mg of carbon-14 non contains 75 mg of the isotope.…

A: Initial amount, [A]0 = 100 mg  Final amount, [A] = 75 mg  Half-life, t1/2 = 5570 years

Q: Calculate the half-life of a radioisotope if it takes 72 years for a sample to decay to 12.5% of its…

A: 100 % to 50 % one t1/2. 50 % to 25 %  second t1/2. 25% to 12.5 third t1/2. three t1/2 = 72 years.…

Q: If the half life of a radioactive element is 32.8 years, how many years will it take for a sample to…

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Q: The half-life of Polonium-218 is 3.00 minutes.  How many half-lives pass after 18.0 minutes ?  The…

A: Concept - Radioactive decays are first order reactions. So we use the formula, Nt = No(1/2)n, where…

Q: What is the half-life of lead-210 if 47.4 years are required for the activity of a sample of…

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Q: It takes 32 days for 512 grams sample of element X to decay to final amount of 4grams. What is the…

A: We are asked to calculate the half-life of element X.

Q: amount of carbon-14 remaining in them. Artifacts that are made of living things (wood , animal hide…

A: Here the disintegration rates of Carbon-14 are given for a wooden artifact and an equivalent fresh…

Q: radioactive material initially is observed to have an activity of 8000 decays/sec. If twelve hours…

A: Radioactive decay follow first order kinetics. For first order reaction:  Kt = ln(A0/At) K = Rate…

Q: If 7.0 grams of a sample decays to 0.44 grams in 2.0 hours, what is the half-life time of the…

A: For calculation of half life first of all we need rate constant of the reaction, which can be…

Q: The radioactive isotope 8P decays by positron emission. If the mass of a sample of phosphorus-28…

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Q: The half life of a radioactive iodine is 8 days. How long will it take for 0.25 g of radioactive…

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Q: A tree sample was uprooted and buried 60,000 years ago during part of the Wisconsin glaciation. The…

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Q: Plutonium 240, 240 24PU, has a half life of 6500 years. The new element formed after Plutonium 240…

A: While writing nuclear reaction the sum of mass number on reactant and product side are equal. Same…

Q: A wooden artifact from an Indian temple has a 14C activity of 42 counts per minute as compared with…

A: The question is based on concept of radioactive decay. we have to calculate the age of the wooden…

Q: The half life of 21 At is 7.214 hours. What fraction of a sample of21At will remain after 3.141…

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Q: Heeded for this question. The half-life of the radioactive isotope thallium-210 is 1.30 minutes. How…

A: half-life = t1/2  = 1.30 min initial concentration = ao = 51.3 microgram final concentration = a =…

Q: Calculate the half-life of a radioisotope if it takes 144 years for a sample to decay to 12.5% of…

A: N = 0.125 No N/No = 0.125

Q: If a radioisotope's half-life is 2 minutes, after two half-lives there is left   0% of the original…

A: Given, a radioisotope's half-life is 2 minutes.we are asked to calculate the amount of original…

Q: A wooden artifact from a Chinese temple has a ¹4C activity of 24.9 counts per minute as compared…

A: we have to calculate the age of the sample of wooden artifact

Q: The amount of a radioisotope that remains after two half-lives have passed is:

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Q: If-Life The half-life of plutonium-239 is 24 110 years. Of an original mass of 100.g, how much…

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Q: initial activity of the sa

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Q: A radioactive material is sampled from a site of leakage. In 2020, the amount of radioactive…

A: Given that, in 2020, the amount of radioactive material left is Ct = 92 mg. Also, given that in…

Q: A sample of niobium contains 2.50 micrograms of Nb-95.  Determine the activity of the sample in…

A: Interpretation -  To determine the activity of the sample in millicuries when a sample of niobium…

Q: 4.605 The time for 99% of a sample of a radioisotope to decay is given by the equation to.99 = k…

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Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: Answer..

Q: Nuclides with too many neutrons to be in the band of stability are most likely to decay by what…

A: Nuclides with too many neutrons lie above in the band of stability. This nuclie which has more…

Q: The half-lives of all the isotopes in the uranium decay series are short when compared to…

A: Answer:The numbers mentioned before the chemical species in a balanced chemical equation is called…

Q: . If the half-life of a radioisotope is 3

A: Half life (t1/2 or t50%) :  The time required to consume half of the initial reactant is called "…

Q: What is a radioisotope and explain the term ‘half-life’? Calculate what fraction of a radioisotope…

A: Radioisotope are the radioactive isotope of an Elements  or it can also be defined as the atoms that…

Q: How many days would it take for a 1.0 milligram sample to reach this level if the half-life…

A: Since the decay reactions are first order  hence we can say 2 things about them  1) half life =…

Q: A sample of 113m In has a half life of 100 minutes. What amount of 113m In remains (in CPM) if a…

A: An exponential decay can be described by the formula:

Q: The half-life of a certain radioactive substance is 14 days. There are 6.6 g present initially.…

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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.