Many scientists believe that large asteroid struck the earth that kill off dinosaurs. Fragment of asteroid had found out and contain 86% of its original uranium-238. How old is the fragment of the asteroid? The half-life of uranium-238 is 4.5 billion years

Q: Carbon Dating: Carbon-14 commonly used for dating historical artifacts, is a radioactive isotope…

A: Radioactive decay follows first order kinetics.  We know that k = 0.693/t(0.5) ...(1) k = rate…

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

A: The time take for the amount of radionuclide in each sample to decrease to 1/16 of the initial…

Q: A sample of carbon-14 has a mass of. 24.77 g. How much will be left after O half-lives? Type your…

A: Given the mass of carbon-14 sample = 24.77 g

Q: A sample of an isotope decayed to 84.1% of its original amount after one year. What is the half-life…

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Q: U-238 decays with the half-life of 4.47 billion years. Calculate the % of a sample left after 13.4B…

A: Given : Half life = 4.47 billion years  Time = 13.4 billion years.

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

A: Radioactive decay follows the first-order kinetics. The half-life of the first-order reaction does…

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

A: The process in which unstable nuclei lose energy by radiation, and converts into new elements. The…

Q: Anwita is on a geology feild trip and finds a rock that contains 38% of the original potassium-40,…

A: Half life of potassium-40= 1.25×10^9 Initial amount of potassium -40 = 100 gm Final amount of…

Q: 9.) Strontium 90 is a major component of the detonation of nuclear explosives: it is I dangerous…

A: We know that no of atoms  N Present at time t  are given as N= N° e-kt where N° are the initial…

Q: What is the original mass of C-14 in a sample if 10.00 mg of it remains after 20,000 years? The…

A: The C-14 decays according to first order kinetics. Since we know that the relationship between the…

Q: How old is a rock if the mineral biotite from the rock has 75,000 40K atoms and 25,000 40Ar atoms?…

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Q: Thorium, a rare element in the earth's crust, has over seven radioactive isotopes. Of of these Th…

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

Q: The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate…

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Q: About what percentage of the original radioactive sample will be left after 8 minutes? The half-life…

A: Given,  Time = t = 8 8 minutes Half-life period = t1/2 = 2 minutes Percentage of the original…

Q: A) A piece of charcoal that has one-half the radioactivity of a living tree died approximately 5,568…

A: Radioactive decay follows first order kinetics. It has the following relation between t1/2 and k: k…

Q: The half-life of cesium-137 is 30 years. Suppose we have a100-mg sample.(a) Find the mass that…

A: (a) Given half life of cesium- 137 = 30 years. For calculating mass after t years, Formula for…

Q: Uranium is radioactive and decays into lead. This process can be used to date rocks. A piece of…

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Q: Carbon Dating: Carbon-14 commonly used for dating historical artifacts, is a radioactive isotope…

A: Given: Amount of carbon-14 in the bone remaining, [A] = 47% of its original concentration = 0.47…

Q: Technetium-99m (the ‘m’ means a ‘metastable’ or moderately stable species) is generated in nuclear…

A: Use half life and date constant formula  Final mass= 125.95mg

Q: What is the age in years of mummified primate skin that contains 6.25% of the original quantity of…

A: We have to predict the age in years.

Q: a new compound called corpium radioactively decays at the rate of -0.035% every year, if there is…

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Q: Normal No Spacing Head 三三。 Paragraph Styles 22. A normal adult jawbone contains 200 mg of Carbon-14…

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Q: 2. The radioactive potassium-40 isotope decays to argon-40 with a half-life of. a. Write a balanced…

A: t1/2 = 1.2 x 109 year Initial Mass of K = 100 g Remaining Mass = 18 g

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

A: t12 = ln 2K      ⇒ K =ln2t12      , Initial radioactivity  r = KN

Q: ) Initially 200 millions of radioactive substance was present. After 12 hours the mass has decreased…

A: The question is based on the concept of chemical kinetics. We have to calculate half Life and…

Q: A sample has a half life of 100 years. If it has been 200 years since it started to decay and there…

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Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

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Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

A: Radioactivity is the phenomenon in which an unstable nucleus loses energy.

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

A: If t is the time required to reach the concentration N from an initial concentration N0, and t1/2 is…

Q: If 28.0% of a sample of gallium-66 decays in 4.46 hours, what is the half-life of this isotope (in…

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Q: A sample initially contains 60.0g of thorium-234. After 48 days 7.8g of thorium-234 remains…

A: The half lifetime t12of a radioactive compound is the time when it disintegrates to its half of the…

Q: If plutonium-238 has a half-life of 88 years, how long will it take for a 100g sample of it to decay…

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Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person.  If scientists found a…

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Q: he half-life of polonium-210 is about 140 days. How much of a 150g sample remains after t years?

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

Q: Imagine you collected a volcanic rock while on vacation to Hawaii and you want to know how old it…

A: GIVEN: Amount of parent nuclei (U-234) = 4 micrograms Amount of daughter nuclei (Th- 230) = 124…

Q: A normal adult jaw bone contains 200mg of carbon -14 in a living person. If scientists found a…

A: Decay of C-14 follow 1st order kinetics λ (decay constant) = 0.693/t1/2 = 0.693 / 5730 years = 1.21…

Q: The half-life of radioactive element is 5 years. The yearly decay rate is After 12 yearS, of the…

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Q: a radioactive isotope. Z-109 has a half life off 43.1 years. how manny years Will it take the sample…

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Q: Iodine-131 is a convenient radioisotope to monitor thyroid activity in humans. It is a beta emitter…

A: Sodium iodide is considered as a good choice for the source of iodine because it does not pose any…

Q: phosphorus -32 decays to form sulfur -32. The half life of phosphorus -32 is 12 days. How much…

A: Given,Phosphorus-32 decays to form sulphur-32The amount of Phosphorus-32 initially present is 62…

Q: Fun-Fact for the Nickel: The nickel’s name is unique.... It's the only U.S. coin that is called by…

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Q: The half-life of strontium-90 is approximately 29 years. How much of a 500 g sample of strontium-90…

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Q: avier is at NASA analyzing Moon rocks. In one of the rocks from the lunar maria, he discovered 79 %…

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Q: Supposed that a radioactive substance has decayed until only of 1/8 of it remains. For how many…

A: All radioactive substance follows first order kinetics.

Q: A sample of a newly discovered element, West Virginium, has been discovered.  A 167 mg sample has…

A: We will use first order kinetics to solve this question.

Q: how much will remain after 12.0 days?

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Q: Thoron has a high average annual radiation dose according to the graph. Iti eavy radioisotope formed…

A: No

Q: A bone has a carbon-14 decay rate of 4.98 disintegrations per minute per gram of carbon. If a living…

A: Solution : N0= 4.98 dpm N(t) = 15.3 dpm  t1/2 = 5715 years  t = ?

Q: What is the approximate age of the artifact?

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Q: NOTES ASK YOUR TEACHER The Shroud of Turin, which shows the negative image of the body of a man who…

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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.