Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of carbon-11 is administered to a patient for a PET scan, what percentage of carbon-11 will remain in the patient's system after 81.6 min?   a)75.0% b)12.5% c)87.5% d)25.0% e)6.25%

Q: If the initial sample is  1.25 g,  what mass of the original iridium‑192 remains after  65  days?…

A: According to the question we have, Initial mass (original mass) of the sample= Mo = 1.25 g Time (t)…

Q: What type of decay is this? What type of decay is this? 7534Se + °1e --> 753:

A: Radioactive decay - It refers to the disintegration of the unstable nucleus to form a more stable…

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Q: * S -75 Some Radioactive Isotopes Useful in Medical Imaging Mode of Isotope Decay Half-life Use in…

A:

Q: The half-life of cobalt is 5.3 years. How much of a 1.000- mg sample of cobalt-60 is left after 15.9…

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Q: The isotope ⁶⁹Zn undergoes what mode of radioactive decay? A) α emission B) β⁻ emission C) electron…

A: Solution - The isotope ⁶⁹Zn undergoes mode of  β⁻ emission radioactive decay

Q: List various common kinds of nuclear reactions?

A: When nuclei are bombarded with particles like alpha rays, beta rays, proton, electron, neutron,…

Q: The following reaction represents what nuclear process? 214 Pb 214 Bi + 82 83 A. positron emission…

A: The various nuclear processes are discussed belowPositron emission: In this process, the mass number…

Q: What particle completes this reaction

A: Radioactive elements emit continuous radiation and undergo radioactive decay. There is harmful…

Q: Which kind of radiation from radioactive substances is most dangerous to humans?  What type of…

A: The radioactive radiation emitted by radioactive substances are: i) Alpha radiation ii) Beta…

Q: Fill in the missing symbol in this nuclear chemical equation. "c - "B +0

A: The reaction given is, => 116C -------> 115B + AZX Where AZX is the missing symbol.

Q: Suppose a carbon-14 nuclide decays into a nitrogen-14 nuclide by emitting an electron. Complete the…

A: In the given question, both parent and daughter nuclei have same mass number but have different…

Q: 5. Strontium-90 is a dangerous by-product of atomic testing because it mimics the action of calcium…

A: Soln In a beta particle emission the particle which is given off is an electron with the symbol. If…

Q: What type of nuclear reaction is this? GAMMA DECAY Ni :Y+Ni 60 28 60 28 gamma alpha beta k-capture

A: There are some decay reactions which releases energy in the form of electromagnetic waves called…

Q: Questions 7 and 8 complete the following nuclear equations and identify the missing particle 127Cs…

A: Given equation is  Cs = He + ?

Q: Balance this nuclear reaction by supplying the missing nucleus. Replace each question mark with an…

A: Balance the atomic no. and atomic mass on both side of the reaction.

Q: Isotopes that are used to determine groundwater recharge seasonality are referred to by I) stable or…

A: Answer - The correct option is (i) Stable  Explanation - The stable isotopes of oxygen and hydrogen…

Q: Ses an isotope produced from atmospherc testing of maclear bombs. lf nucler testing was stopped in…

A: Given: Half-life of isotope = 28.5 years. The testing was stopped in 1960. And the analysis is being…

Q: Mr. Albedo stumbled upon an unknown material in an abandoned laboratory. He believes that this…

A:

Q: 6. You find a very interesting painting on wood done in the style of Rembrandt's "dark period" (1642…

A: The equation that represents the integrated rate law for the first-order kinetics is shown below.…

Q: Q1 Write a balance nuclear reaction for each of the following. (1) ²10P0 84P0 28 (2) 13AL (3) y…

A:

Q: Why do scientists expect fusion to eventually replace fission ás a nuclear process?

A: Given : Fusion will replace fission in nuclear processes eventually. Fusion is a process in which…

Q: 50 ng of a radioactive isotope with a half-life of 23 seconds is expected to decay exponentially.…

A: The initial amount of the given radioactive isotope is = 50 ng The half-life of the given…

Q: An unknown radioactive element decays into non-radioactive substances.  In 660 days the…

A: Rate constant (k)= 2.303/t log 100/49 So k = (2.303/660) ×0.3098 =0.0011 days ^-1

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A: Decay process is a first order reaction. Therefore we have to put the integrated rate law for first…

Q: A 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: Radioactive decay follows first-order kinetics. The half-life of the first-order reaction does not…

Q: The nuclear decay of Radium-226 includes gamma decay and what other type of radioactive decay? 226Ra…

A: Recall the given nuclear reaction         R226a → R222n + H4e + γ Here γ emission occurs so this is…

Q: What is needed to balance the nuclear fission reaction below?  n+U→Te+ ? +2n

A: Nuclear fission reaction is a reaction in which parent nucleus breaks down and forms different…

Q: Part 1.1. If a radioactive element has a half-life of 2.5 million years, the amount of parent…

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Q: Radiation Particle Emitted: Positron Provide the missing information for the following bombardment…

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Q: radioisotope

A: Gamma rays:  Radioactive elements have nuclei that are unstable.The nuclei undergo radioactive decay…

Q: Of an initial amount of 7000 g of​ lead-210, how much will remain in 180 ​years? Lead-210 decays at…

A: Initial amount of lead-210 = 7000 gm Time = 180 years Decay constant (k) = 3.15 % / year

Q: (1) The radioactive isotope thallium-201 is used in medical imaging as indicated on the table above.…

A: Gamma emission occurs when a radioactive atom emits a gamma ray. It does not contain any mass or…

Q: Isotope X goes through a BETA decay and becomes isotope Y. Isotope Y goes through an ALPHA decay and…

A:

Q: What isotope results from a decay of the americium-241 in smoke detectors?

A: Isotope  They are the different forms of any chemical element in which the number of protons are…

Q: If the half-life of a radioactive substance is 4 days how much material will remain after 16 days if…

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Q: Fill in the missing symbol in this nuclear chemical equation. 0+H - N+He

A: In nuclear reactions, the fundamental particles involved are protons and neutrons, and the equation…

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.