Iodine-123 can be used as a tracer specific for the thyroid gland. If a thyroid is NOT overactive, a _____ will form when I-123 is administered. a. free radical b. mutation c. "cold spot" d. "hot spot"

Q: The half-life of 26?? 59 is 44.6 days. How long will it take for 95.0% of a sample of this nuclide…

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

A: Calculations for all the samples is done below.

Q: Explain how nuclear radiation of all kinds are harmful to living organisms. Explain how isotopes…

A: Nuclear radiation is more harmful because it can break chemical bonds or ionise molecules, damaging…

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: The mass OF 1.00 of water is 18-09 true or Fal se ?

A: Molar mass of water = 18.015 gram

Q: Write balanced equations for the decays of 13N and 18F, two other radioisotopes that are used in…

A: Positron collision with an electron causes annihilation.In annihilation process any subatomic…

Q: 128Ba+ ____  -->  128Cs         Alpha emission     Beta emission     Positron emission…

A: The atomic number of Ba is 56 and Cs is 55 Hence the reaction taking place is (assuming the unknown…

Q: The function of the moderator in a nuclear is to O stop chain reaction Reduce the speed of neutrons…

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Q: Indicate the number of: protons neutrons and electrons for 204pb nuclide.

A: Here we have to find the number of protons, neutrons and elctrons present in 204Pb nuclide isotope.…

Q: Many scientists believe that large asteroid struck the earth that kill off dinosaurs. Fragment of…

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Q: The smallest C-14 activity that can be measured is about 0.20%. If C-14 is used to date an object,…

A: Given :          C-14 activity measured is = 0.20% We have to calculate object died within how many…

Q: How many days would it take for one-fourth of the sample to decay? 37.5 days time: Incorrect

A: To calc the time , we first need to check the percent of iridium remaining after one-fourth decay.…

Q: Assuming that the global amount of radiocarbon is constant, decaying Carbon-14 is repeatedly…

A: The carbon-14 nucleus is a radioactive nucleus and its converts into nitrogen-14 and beta particle.…

Q: [References Breeder reactors are used to convert the nonfissionable nuclide 23TH to a fissionable…

A: A nuclear reaction in which an atomic nucleus and one or more neutrons collide and merge to generate…

Q: (a) What is neutron activation analysis? Explain how this method could be used to determine calcium…

A: The reactions involving formation of new nucleus with emission of some radiation along with it from…

Q: What is the isotope that is used in carbon dating? What is its half-life?

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: The half-life of Po-214 is 0.001 seconds. How much of a 10 gram sample is left after 0.003 seconds?

A: Half life of Polonium, t1/2 = 0.001 second Mass of sample = 10 g

Q: What radioisotope could be a problem in homes built of cinder blocks made from uranium mine…

A: Uranium mine tailing is a waste from the Uranium mill that is used for preparing cinder blocks.…

Q: The radioisotope 3516S will decay through

A: For the stablity of nucleus N/P ratio for lighter nuclei must be equal to 1. And unstable nuclei…

Q: III. Uranium-238 undergoes a radioactive decay chain before it reaches nudear stability, forming the…

A: In nuclear reaction emmision of alpha and beta particles are quite common. Alpha particle which is…

Q: The half-life of ^40K is 1.27 billion years (bY). It was determined that only 10.2% of the original…

A: Radio active decay follows first order kinetics. Half-life of a first  order reaction is: where,…

Q: Pellets of enriched uranium oxide are embedded into rods and covered with water in the reactor core.…

A:

Q: When did the world know fusion existed? Select one: B.1920 C.1960 D.1980

A: FUSION:--It is process in which two nuclei fuse with each other and produces energy. •Fusion of…

Q: If a radioisotope's half-life is 2 minutes, after two half-lives there is left   0% of the original…

A: Given, a radioisotope's half-life is 2 minutes.we are asked to calculate the amount of original…

Q: Tungsten-180 decays into hafnium-176 and an unknown particle. What is the unknown particle

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Q: initial activity of the sa

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Q: Precisely describe how a stable atom can be made to become a radioactive.

A: How a stable atom can be made to become a radioactive has to explained,

Q: radioisotope

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

Q: What two ways are radioactive tracers used in organisms?

A: To find: Two ways in which radioactive tracers used in organisms

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

A: Given Sample 23 umol 1/16

Q: d. nuclear fission of Uranium-235 to form Caesium-135, four neutrons, and an unknown nuclide e.…

A: Balanced nuclear reaction represent number of proton and mass number are present in equal number.

Q: Why is radiation so harmful to living things?     creates free radicals which are highly reactive…

A: Radiation is harmful to living things in many ways: Ionising radiation results in formation of…

Q: What is the missing symbol in this plutonium fission reaction?

A: The given plutonium fission reaction is, For atomic number of the unknown = 94 - 38 = 56 The symbol…

Q: Iodine -131 decays, but remains Iodine-131. What was emitted from the nucleus?

A: Iodine -131 decays but remains iodine 131.  What was emitted from the nucleus = ?

Q: Solve for the alpha decay 241/95 Am

A: We have to give equation of alpha decay of Am-241

Q: Boron control rods are used in nuclear reactors to absorb neutrons. What nuclide forms when 10°B…

A: Boron control rod are used in nuclear reactions toabsorbs neutrons. When B10 absorbs one neutron and…

Q: Th-232 (goes through a decay) → ? (goes through B decay) → ? (goes through B decay) → ? (goes…

A: We have to write the product for a portion of the radioactive decay series that starts with Th-232…

Q: Iron-55 nuclei are bombarded with carbon-12 nuclei to produce a beta particle and one other nuclei.…

A: According to question:i) F2655e  + C612 → β-10 +........we know that, i)  the sum of mass number on…

Q: Which acts as storage of genetic information in cells? a. nucleic acids b. lipids c. proteins d.…

A: Nucleic acid contains of N containing bases such as Adenine, Guanine, Cytosine, Thymine and Uracil.…

Q: Lead-210(210Pb) decaays by emitting a beta.what is the product

A: After removing Beta particle the mass no of the new element remain same but atomic no increases by…

Q: Fire a neutron into the U-235 nucleus with the “neutron gun”. What happens to the potential energy…

A: A question based on nuclear chemistry, which is to be accomplished.

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

A:

Q: SHOW FULL SOL The initial amount of the radioactive material B in a rock is determined to be 19.08…

A: Initial amount of radioactive material = 19.08 mg Amount left = 0.0038 g = 3.8 mg

Q: What is a positron?

A: An atom has three sub-atomic particles namely, protons, neutrons, and electrons. The atom's mass is…

Q: An oxygen atom has been bombarded by an alpha particle and has lost an electron. This oxygen ion…

A: an oxygen atom has been bombarded by an alpha particle and has lost electron. During this process…

Q: Elements up to what number can be a radioisotope that is naturally occurring? 68 88 92 102

A: Elements up to what number can be a radioisotope that is naturally occurring?

Q: What happens to the potential energy of the products (“daughter nuclei”) after fission has occurred?…

A: Whenever there is nuclear fission, an unstable nucleus breaks down into daughter nuclei.

Q: A radioactive sample has a mass of 500 grams. How much remains after two half-lives?

A:

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

A: Given Sample 19 umol Or 1/16 decreases

Q: The radioactive nuclide Co has a shelf-life of 17.5 hours. What mass Co remains from 0.0100g sample…

A: