A radioactive element has a half-life of 3 days. The initial amount of that element is 1024 grams. How many grams of that element are left 12 days later? Write down your answer as an integer value (no decimals) and do not write the unit.

Q: A 416 g sample of sodium-24 decays to 13.0 g of sodium-24 within 60.0 hours. What is the half-life…

A: Given data: The initial quantity is N0=416 g. Quantity after decay is N(t)=13.0 g. Time elapsed is…

Q: The half life of an unknown substance is 1 week. How much of its nuclei were disintegrated after 10…

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Q: If you are told the half life of a material is 3,500 years, then how much would be remaining from a…

A: Given data: Half life (t1/2)= 3,500 years Initial quantity of the substance (N0) = 10 g Time elapsed…

Q: The half-life of Carbon-14 is 7 years. How much of an initial 168 g sample will remain after 30…

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Q: hat atomic number, mass number, and element results when a Radon-222 atom emits a gamma ray through…

A: As we know that the atomic number of Radon is 86 and mass number is 222.

Q: If a material has a half life of 92.5 days, how long will it take for 75% of the material to decay?…

A: Half life of the material=92.5days 75% of the material decay

Q: sample of iodine-126 with an original mass of 15mg loses 13.125mg of the original mass of the…

A: sample of iodine-126 with an original mass of 15mg loses 13.125mg of the original mass of the…

Q: Q6: 100 g of radioactive element X are placed in a sealed box. The half-life of this isotope of X is…

A: Disclaimer: Since you have posted two questions and no specific question number is mentioned, we…

Q: A radioactive sample has a mass of 999 grams. How much remains after 2 half-lives?

A: If the amount of a radioactive sample is N0 initially, then after 1st half live of the sample, it…

Q: A particular isotope has a half-life of 1 minute. If you start with 1 gram of this isotope, how much…

A: In the given question, We have to determine the remaining quantity of the isotope after 10 minute.

Q: The half-life of a radioactive material whose rate of disintegration is proportional to the amount…

A: The half-life of a radioactive element is defined as the time required to decrease the initial…

Q: What mass of a 2,400g sample of an isotope will remain after 32.8 days if the half life of the…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: A sample containing 1 gram of Radium-224 was stored in laboratory 100 years ago. Now the sample…

A: Given data: The mass of Radium-224 at 100 years ago is m0=1 g. The mass of Radium-224 at now is…

Q: Which radioactive isotopes are produced when Uranium 238 decays?

A: When uranium 238 decays, it decay by emitting alpha particle.

Q: Certain radioactive substances has a half-life of 20 min. If there is 56 lbs of it right now, how…

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Q: A radioactive material has a half-life of eight days. How long will it take for the material to be…

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Q: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: Given data The half-life of the cesium-137 is t1/2 = 29.75 years. The initial amount of the…

Q: Thirty percent of a radioactive substance decays in two years. By what percent does the substance…

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Q: A sample of polonium-208 has a half-life of 2.898 years. What percent of polonium-208 remains after…

A: The half-life of a radioactive substance is the time required for a quantity to reduce to half of…

Q: If carbon-14 underwent beta decay, what is the resulting nucleus?

A: Beta decay:  A element which undergoes beta decay then the neutron of the atom gets converted to…

Q: When radium 226 decays emitting an alpha particle, what is the atomic number and atomic mass of the…

A: The alpha particle having mass number 4 and atomic number 2 and it is a helium nucleus.

Q: A radioactive substance plutonium-239 has a half-life of 24,000 years. Initially, there is 700 mg of…

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Q: A sample of Uranium ore is estimated to have originally contained 805 mg of uranium-238. Analysis…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What is the half-life of a radioactive isotope if the activity of a sample drops from 14,080 cpm to…

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Q: What happens when one kilogram of uranium undergoes nuclear fission?

A: to find : what happens when 1 kg of Uranium undergoes nuclear fission

Q: how much energy (in Joules) is released by Helium -4 during a nuclear reaction?

A: Given: Helium-4  Asked to find energy released during a nuclear reaction.

Q: f the half-life of cesium-137 is 30 years, approximately how much time will be required to reduce a…

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Q: If the half-life of an isotope is two years, what fraction of the isotope remains after six years

A: Amount of radioactive material after time t is given by: N = N0*exp(-lambda*t) lambda = decay…

Q: A radioactive isotope has a half-life of 51.5 days. What fraction of the isotope remains after 413…

A: We have: The half-life is t1/2=51.5 days Calculating the first-order reaction constant k as…

Q: The half-life of Uranium-237 is 5.83 x 105 If you have a sample with 5.89 x 1024 atoms in it, how…

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Q: The half-life of a particular radioactive isotope is 6.5 h. If there are initially 48 * 1019 atoms…

A: Given:  Half life of isotope, T = 6.5 hours  Initial number of atoms, No = 48 x 1019 atoms  Total…

Q: If a sample of a radioactive isotope has a half-life of 3 years, how much of the original sample…

A: The half-life of the sample = 3 years (a) That means, after every 3year the sample becomes half of…

Q: Radium-226, the first radioactive isotope used for its radioactive properties, has a half life of…

A: Radium-226 has a half-life, T12=23.0 centuries. The value of the rate constant is given by: λ=ln2T12…

Q: The half-life of a radioactive isotope is 140 d. How many days would it take for the decay rate of a…

A: Given:  Half life of the isotope, T = 140 days

Q: Carbon 14, with a half-life of 5700 years, is used to estimate the age of organic materials. What…

A: The expression for the half-life of carbon-14 is written as, Here, λ represents the decay constant…

Q: A radioactive nuclide has a half-life of 10 seconds. Beginning with 256 grams of the material, how…

A: Given: Half life period t1/2 = 10 sec Initial concentration N0 = 256 g Time = 1 min = 60 sec = 6…

Q: You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly…

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Q: The half-life of the radioactive element unobtanium-53 is 5 seconds. If 176 grams of unobtanium-53…

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Q: If a 1.50-cm-thick piece of lead can absorb 90.0% of the γ rays from a radioactive source, how many…

A: Given data The thickness of the lead piece is x = 1.50 cm. Lead can absorb 90% of the γ rays.…

Q: Technetium-99m is a radioactive isotope with a half-life of 6 hours. If a sample of was originally…

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Q: the half-life of Uranium-238 is 4.46 × 109 years. If a sample of mass 10kg is thought to have formed…

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Q: A radioactive isotope of silver has half-life of 20 minutes. What fraction of the original mass…

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.