Explain the concept of half-life with respect to radioactive nuclides. What rate law is characteristic of radioactivity?

Q: How long will it take a radioactive sample of iodine-131 (half-life 8.07  d ) to lose 99.2  %  of…

A: The given disintegration reaction is first order reaction. Half life t1/2 = 0.693 / K 8.07 days =…

Q: If the amount of a radioactive element decreases from 0.36 g to 90. mg in 22 min, what is its…

A: Half-life (t1/2) is defined as the time required by a substance to reduce to half of its initial…

Q: It takes 4 h 39 min for a 2.00-mg sample of radium-230 to decay to 0.25 mg. What is the half-life of…

A: Half life of first order kinetic reaction is given by:

Q: The half-life of Ga-67 is 77 9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A: Given  Half life of Ga- 67 = 77.9 hours  decay % = 95 %  Time ( t ) = ?

Q: The number of radioactive nuclides in a sample decays from 3.80 x to 1020 19 9.50 x 10 in 58.0…

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

A:

Q: What is the half-life (t1/2) of a radioisotope if 1000 grams of the sample decays to 125 grams in…

A: The nuclear half-life is amount of time it takes for half of sample to decay radioactively.…

Q: Fill in the missing component in the following nuclear transmutations: 88Sr + 84Kr 116Pd + a. 238U +…

A:

Q: cosmogenic radionuclides

A: In this question we have to tell about cosmogenic radionuclides and their corresponding energy.

Q: What is the half life of a radioactive sample , if 3/4 of its nuclei decay in 2 years ?

A: Given:The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass =…

Q: Plutonium-239 (t12 = 2.41 × 10* yr) represents a serious nuclear waste hazard. If seven half-lives…

A: Given  Number of Half lives  ( n ) = 7  Half life time  ( t1/2 )    = 2.41 × 104  year  Time ( t )…

Q: Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60…

A: The half life of cobalt-60 is = 5.3 year The fraction of cobalt-60 atoms will remain in a particular…

Q: Calculate how long will it take for a sample of a radionuclide with a half-life of 30.9 days decay…

A:

Q: 8. How long will it take for a sample of plutonium -239 with a half-life of 24000 years to decay to…

A: Given information : plutonium-239 Half life (t1/2) = 24,000 years Initial amount = Ao Final amount…

Q: The half-life of the nuclide 211 At is 7.5 h. If 0.100 mg of this nuclide is administered for…

A: The answer to the following question is-

Q: Krypton-85 has a half life of 10 years. Approximately what percentage of Kr-85 produced from the…

A:

Q: What other isotope besides tellurium-137 is produced by nuclear fission of uranium-235?

A: Radioactive decay refers to the breakdown of an unstable nucleus to a stable nucleus with the…

Q: The half-life of tritium is 12.3 years. If 48.0 mg of tritium is released from a nuclear power plant…

A: Given data contains, Half-life of tritium is 12.3 years Mass of tritium is 48.0 g Time t is 5.0…

Q: Radioactive decay is typically second order.

A: True or false. Why?

Q: How many of the nuclei of a radioactive sample containing 2048nuclei decay in 3 years, if its half…

A: The number of nuclei of a radioactive sample containing 2048 nuclei that decays in 3 years is to be…

Q: Radium-221 has a half life of 30 seconds. How long will it take for 82% of a sample to decay?

A: Half life =30 seconds Decay percentage = 80%

Q: If californium-251 transmutes into curium-247 and some other pieces as time goes on, which nuclear…

A: Answer :-  The nuclear reaction is alpha decay…

Q: Define Radiotracers?

A: Radiotracers also called as radiolabel compound which are use as a path tracers of reaction , drug…

Q: Cobalt-60 is a beta-emitter used in radiation cancer treatment equipment in hospitals. What total…

A: Given Initial mass = 24 g half life = 5.33 years time = 16 years

Q: Determine the decay constants ( in seconds) for iodine and magnesium given half lives are 8.04 days…

A: Relationship between half life and decay constant is given as,

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: what fraction of a radioisotope has decayed after two half-lives?

A: The time required for a quantity of a radioisotope to decay by half is known as the half-life time.…

Q: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

A: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

Q: If the amount of radioactive element decreases from 2.4 g to 0.30 g in 36 days, what is its…

A: Half life is defined as the time taken by the radioactive sample to decay to half its original…

Q: Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.20…

A:

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

A: Radioactive decay reactions are first order reactions. The calculation can be done using first order…

Q: (c) Given that radioactive cobalt-60 has a radioactive constant equal to 7.6 x 10 s', determine its…

A:

Q: If one-trillionth of the atoms of a radioactive isotope disin-tegrate each day, what is the decay…

A: One trillionth of radioactive isotope decay takes place in a day. I trillion = 1.0 x 1012  The…

Q: Radium-223 decays with a half-life of 11.4 days. How long will it take for a 0.240 mol sample of…

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Q: Vhat is the half-life of a radioisotop

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Q: IUCLEAR REACTIONS Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear…

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Q: E Reae The half life of chromium-51 is 27.8 days. How many days are required for 15/16 of a sample…

A: Chemical Kinetics  1st order Kinetics  Nuclear Decay  Step-2 Has further calculation

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.

A:

Q: decay

A: T1/2 = 28 yrs N = 0.40 g No = ? at T = 56 years

Q: A radionuclide undergoes beta decay with half-life of 30.0 years. How many years will it take for 25…

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Q: The atomic masses of nitrogen-14, titanium-48, and xenon-129 are 13.999234 amu, 47.935878 amu, and…

A: We have to calculate the nuclear binding energy. when Binding energy for a nucleus divided by the…

Q: Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear reaction of Zn-62 as…

A: As per the rules, only three sub-parts can be answered:

Q: the half-life of aluminum 26 is .74 million years. Suppose an asteroid contained 800 kg of aluminum…

A: The half-life of aluminum 26 is 0.74 million years. The mass of aluminum 26 present in asteroid is…

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.