One hundred kilograms of a certain radioactive substance decay to 40 kg after 10 years. How much will remain after 20 years?

Q: λ =

A: Deacy of an unstable atom is defined by the radioactive decay law. It states that the probability…

Q: Plutonium-239 has a half life of 24100 yr. Starting with a sample of pure 239 Pu, how long would it…

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Q: A radioactive sample has a decay constant of 55.0 x 10-¹2 s¹. Estimate its half-life.

A: Radioactive decay is the process by which unstable nuclei spontaneously lose energy to become…

Q: Radium decomposes at a rate proportional to the amount present. In 100 years, 100 mg of radium is…

A: Given: The mass of radium is No=100 mg. The reduced radium mass is N(t)=96 mg. Let λ is the decay…

Q: A sample of radioactive material contains 1x 1014 atoms and has an activity of 6.3 x 1011 Bq. What…

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Q: A freshly prepared sample of a certain radioactive isotope has an activity of 3,7 × 1011 decays/s.…

A: Given quantities: initial activity of the isotope (A0) = 3.7 × 1011 decays/s activity of the isotope…

Q: Example 12.11. Radioactive isotope 18 F has a half-life of 110 min. How much time does it take for…

A: Half life of radioactive isotope of 18 F , t1/2=110 min  To determine time does it take for 99% of…

Q: Strontium is chemically similar to calcium and can replace calcium in bones. The radiation from ⁹⁰Sr…

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Q: The radioactive isotope 209 Po has a half-life of 103 years. How long would it take 84 for only 4.00…

A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…

Q: radioactive sample initially undergoes 12.0×10^4 decays/s. Twenty-four hours later, its activity is…

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Q: A radioactive sample containing approximately 6.52×10¹3 radioactive nuclides has a half-life of 5730…

A: Radioactive nuclides are those nuclides that are unstable. This happens due to the mismatch between…

Q: You have an istope with a decay constant of 2.48x10-³s-¹. What is the half life of isotope?

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Q: When a nucleus decays by emitting an alpha particle, what is the atomic number of the resulting…

A: Given: 88 Ra226

Q: A radioactive substance has a half-life period of 30 days. What is the disintegration constant?

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Q: The half-life of a radioactive isotope is known to be exactly 1 h. a) What fraction of a sample…

A: Given in question - Half-life (T) = 1 hour Solution: Step1 - Here we will understand the concept…

Q: You measure the decay rate of a radioactive sample to be 4.225 x 101 Bq. After 139 seconds, the…

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Nuclear Fission

Nuclear fission is a type of nuclear reaction in which heavier nuclei split into lighter nuclei by releasing a large quantity of energy. The elements like uranium-235 and plutonium-239 isotope undergo nuclear fission releasing energy. When nuclei undergo fission, some quantity of mass is lost. The lost mass is converted to nuclear energy. Nuclear fission reaction is used in nuclear power plants and atomic bombs. In nuclear power plants, nuclear reactors are used to generate electricity.

Endothermic Nuclear Reaction

A nuclear reaction can be described as a process where two atoms, or two nuclei or nucleus and subatomic particles such as a proton, neutron interact together, and a large amount of energy is produced and new elements are also produced.