A certain radioactive has a half life of 20years. i) Calculate the disintegration constant of the isotope ii) Calculate how long it will take three-quarters of the original atoms to have disintegrated. iii) In a nuclear reactor, what are the particles produced? iv) List at least (5) man made isotopes v) List at least (5) use of man made radioisotopes

Q: Iodine that answers the body is stored in the thyroid gland from which is released to control growth…

A: Radioactive decay follows of first order Kinetics.

Q: The gallium-67 nuclide is used in tumor diagnostic applications. This has a half-life of 78.2 hours.…

A: given, half life =  78.2 hours  time = 5.00 days

Q: a. Two or more nuclei combine to form one larger nucleus in the process of nuclear_ i) fission, ii)…

A: We need to fill answers for the given short questions.

Q: 1. A substance has a mass of 5 grams after decaying for 100 minutes. What was the mass of the…

A: Given that: Mass of substance left after decaying = 5 g Total time for decaying of substance = 100…

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

A: A radioactive decay follows the first order kinetics where the rate of the reaction depends on the…

Q: Use your knowledge obtained while studying nuclear reactions to explain how the rate of decay of a…

A: The half-life of the given radioactive reaction is the time at which the reactant is disintegrated…

Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 42.1% as…

A: Given: Amount of isotope in handle = 42.1 % of a living tree. And the half-life of the isotope…

Q: Half-life is the time required for a radioactive element to decay to half of its original mass.…

A: Given: The % of original radium sample=100% The % of a sample of radium that has decayed=75% The…

Q: In a treatment that decreases pain and reduces inflammation of the lining of the knee joint, a…

A: Initial count (No) = 1100 per second Final count (Nt) = 1.14 per second Time (t) = 24 hours

Q: An artifact is found that has 33% of the 14C it had when it was living. How long ago was this…

A:

Q: Uranium-240 has a half-life of 14.1 hours (note this is NOT a fissionable isotope).  A country with…

A:

Q: A piece of literature has announced that Uranium 238( 23822U) has a binding energy of approximately…

A: We can theoretically calculate the mass of a neutron. But this will be different from the…

Q: A shell fossil that originally contained 100 mg of carbon-14 non contains 75 mg of the isotope.…

A: Initial amount, [A]0 = 100 mg  Final amount, [A] = 75 mg  Half-life, t1/2 = 5570 years

Q: 8. Patients with Graves disease have an overactive thyroid gland, and are commonly treated with…

A: Given the half-life of I-131, t1/2 = 8.0 days Initial activity, Ao = 9.9 mCi

Q: A 1.00-gram sample cantains two radioactive isotopes A and B. The half-life of isotope A is 2 hrs.…

A:

Q: ) Cobalt―60 is a radioactive isotope with a half-life of 5.26 years and emits beta particles.…

A: Radioactive nuclei undergo disintegration with time. They emit different kind of particles and…

Q: Suppose that 10 units of beryllium are present in a living organism and that the half-life of…

A: Here i have calculated the age of material

Q: Carbon-14 has a half life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: Given that, half life , t12= of 5730 years. and  14C has decayed to 1/8.00 of the original amount

Q: tled Section 46. The carbon-14 content of an ancient piece of wood was found to be one- sixteenth of…

A: we know Radioactive decay constant (K)= 0.693t1/2Given ,t1/2 = 5730 yearNow ,  K= 0.6935730…

Q: 3. An archeologist unearths a bone sample and wants to know the age of the initial amount of…

A: Given:  Present amount of bone = 49 %  Half life = 5730 years

Q: The half-life of Polonium-218 is 3.00 minutes.  How many half-lives pass after 18.0 minutes ?  The…

A: Concept - Radioactive decays are first order reactions. So we use the formula, Nt = No(1/2)n, where…

Q: A tiny piece of paper taken from the Dead Sea Scrolls has an activity of 10.8 disintegrations per…

A: Radioactive disintegration follows first order kinectics. Hence, the rate of decay can be followed…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.0 g remain. What is the original…

A:

Q: about how much would have been left after three half-lives? A parent isotope has a half-life of 500…

A: Note : As per guidelines we can answer only the first question   The time it takes for the…

Q: Carbon-14 has a half-life of 5730 years, how old is a dress that was found to have a specific…

A:

Q: A 450.0-mg sample of technetium-99m was used for a diagnostic test.  If technetium-99m has an…

A: Given - Initial amount=450.0mg Half life=4.8h Time=48h

Q: Carbon-14 Dating A wooden artifact from an ancient tomb contains 65% of the carbon-14 that is…

A: Given information is as follows; Half life = 5730 years Fraction remaining = 65% = 0.65 The given…

Q: How many half-lives have passed in each of the following situations? (a) Initially the sample is…

A: SOLUTION: Step 1: (a). Half-life is the interval of time required for one-half of the atomic nuclei…

Q: A piece of charcoal from a tree killed by the volcanic eruption that formed the crater in Crater…

A: The radioactive decay follows first-order kinetics. We know that the half-life of carbon-14 is 5730…

Q: Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of…

A: Given that : The half-life of carbon-11 = 20.4 min We have to calculate the % of carbon-11 will…

Q: An unknown radioactive substance has a half-life of 3.20 hours. If  20.8 g of the substance is…

A:

Q: An archeological sample was predicted to be 9,415 years old. If the C-14 measured at present in the…

A:

Q: A radioactive sample contains 1.55 g of an isotope with ahalf-life of 3.8 days. What mass of the…

A: Radioactive isotopes may occur naturally or be artificially produced. Radioactive isotopes possess…

Q: A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (CPM)…

A: Given: Half-life = 5730 years [A]=10 cpm [A]0 = 40 cpm

Q: carbon as a piece of modern charcoal. How long ago was the tree burned to make the ancient charcoal?…

A:

Q: days. show solution 1. Write the balanced nuclear reaction of Ni-56 as it undergoes positron…

A: Given, Half life (t1/2) = 6.075 days 1. Balanced nuclear reaction  28Ni56 --‐-> +1e0 + 27CO56 2.…

Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 41.7% as…

A: Given, half life of C14 = 5730 yr

Q: Tc-99m is the most commonly used radioactive isotope in medicine. It is a gamma emitter and has a…

A: The half life of Tc-99 is six hours. There will be two half lives involved in twelve hours. The…

Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 35.2% as…

A:

Q: A) An isotope of uranium-238 decays by alpha emission. The half life of this isotope is 30 years.…

A: Atomic number of uranium = 92 Hence the symbol of uranium-238 = 23892U

Q: carbon-14 activity

A: Given data, Basic equation is Ae = Ao x 0.5 (t / t1/2)   Therefore,

Q: 1. If a sample contains 100 g of a radioactive isotope, how much will be left after 3 half lives? 2.…

A: Since you have posted a question with multiple sub-parts,we will solve first three sub-parts for…

Q: Cesium 137 is a commonly used isotope in the treatment of some cancers, someone you know may have…

A: The reactant given is Cesium 137 i.e 13755Cs.

Q: First order the samples by decreasing initial video activity then calculate how long it will take…

A: Calculation for time to decrease by 1/8 of initial amount of sample A:

Q: Carbon-14 has a half-life of 5730 yearsyears. In a plant fossil, you find that the 14C14C has…

A: Given data:

Q: A sample of wooden artifact is found to undergo 8 HC disintegrations per minute per gram of carbon.…

A:

Q: You are working as a technician in the radiology department of a large hospital. One of the…

A: The relation between activity, total time and half-life is shown below:

Q: The cesium-137 has a half life of 30 years after 90 years about 10g.remains. the original mass of…

A:

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.10 billion years old by…

A: Concept:  Radioactive decay: It is the process by which an unstable atomic nucleus loses energy by…

Q: Uranium235 decays to a form of Pb207 with a half-life of 710 million years. If an outcrop of rock…

A: Half life of the parent isotope = 7.1 × 108 years Since radioactive decay follows first order…