Bandages can be sterilized by exposure to gamma radiation from cobalt-60, which has ahalf-life of 5.27 y. How much of a 10.0-mg sample of cobalt-60 is left after one half-life?Two half-lives? Three half-lives?

Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A: Given  Half life of Lead - 196     = 37 min  Initial Amount (A)0          =  64 mg Remaining Amount…

Q: How long does it take for a radioactive substance to decay from 360 cps to 11.25 cps if the…

A: Half-life is the time required for the reaction to be half completed. It is denoted by t1/2 . For a…

Q: Technetium-99m, a metastable state of technetium-99 commonly used in nuclear medicine, has a…

A:

Q: 29) a rock from the moon was found to contain 1.0 x 10* g (A,) of uranium-238 and 4.0 x 10“ g…

A: The half-life of a radioactive isotope (t1/2 ): All radioactive decay first-order reaction kinetics.…

Q: Radium-226 has a half-life of 1600 years. If a sample of radium-226 has a mass of 512 milligrams,…

A: we have to calculate mass of radium-226 remaining after 8000 years  Sign of the values R and S

Q: The ratio of carbon-14 to carbon-12 in the atmosphere is 1.5 x 10-2 atoms of carbon-14 to one atom…

A: The objective of the question is to calculate the age of a fossil based on the ratio of carbon-14 to…

Q: The half-life of Oxygen-14 is 1.177 minutes.  You originally have 20 grams of it.  After roughly 3.5…

A: Given: Half-life of Oxygen-14 is 1.177 minutes Mass of Oxygen-14 is 20 g

Q: A sample of Thorium-228 has a half life of 1.9116 years. what percent of thorium 228 remains after…

A: Let the initial amount be A0After the first half-life the amount remaining is

Q: The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of…

A: Given  Half life of cesium - 129 =  32 hours  Remaining activity [ A ] = 14.5 %  Time ( t ) = ?

Q: A rock is found to have 12.75 mg of 238U and 1.19 mg of 206 Pb. Determine the age of the rock. The…

A: Age of rockT = (2.303 / ) *log (No/N) Where   = 0.693/t1/2Where,No is the initial quantity of 238U…

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Formula for radioactive decay is given as,

Q: The half life of Carbon-14 is 5730 years. Calculate what percentage of C-14 will remain after 17,190…

A:

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Half life of technetium - 99 is = 6 hours.  Let Take a sample of technetium - 99 having number of…

Q: An isotope of cobalt-60, is used in medical therapy. When the radioisotope activity has decreased to…

A: The half-life of cobalt-60 is given as 5.24 years. This means that the radioisotope activity will…

Q: the half life of carbon-14 is 5730 years. how long does it take for 2.6 grams of carbon-14 to be…

A:

Q: lodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A: The half life of the iodine -131 = 8.04 daysThe time required for sample to reduce to 6.14 % of…

Q: You have a sample of Bismuth-212 to prepare for an upcoming medical test.  This isotope has a…

A: The radioactivity follows first-order kinetics. The half-life relates to the rate constant, k for…

Q: at 8:00 am, a patient receives a 1.5 micrograms dose of I-131 to treat thyroid cancer. if I -131 has…

A: 1.5 micrograms dose of I-131Half life = 8 daysmass pf the I-131 the next days 05.00 pm=?mass pf the…

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A:

Q: The half-life of 14C is 5730 years. A sample contains 92.4% of the 14C it would contain if it were…

A: The age of the old fossils can be find out by using carbon dating method.  So the amount of 14C…

Q: The half-life of 90Sr is 28.8 years. How long will it take (in years) for a 86.1 mg sample of 20Sr…

A: Given t= 28.8 years. t1/2 = ?

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

A:

Q: One of the radioactive isotopes used in medical treatment or analysis is iodine-131. The half-life…

A: The relationship between the decay constant and the half-life period is given below.

Q: if 8.000 grams of U-234 are sealed in a container and then opened many years later -- how much time…

A:

Q: The half-life of nitrogen-16 is 7.0 seconds. How long does it take for 100 mg of nitrogen-16 to be…

A:

Q: Barium-131 is a radioisotope used to study bone formation. A patient ingested barium-131. How much…

A:

Q: At 7:00 AM a hospital uses its cyclotron to make 1.00 milligram of the isotope F-18 for use as a…

A: “Since there are multiple questions and it is not mentioned that which one has to be solved so I am…

Q: The half-life of carbon-14 is 5730 years. What does this statement mean? [A] It means that carbon-14…

A: Given: The half-life t12 of carbon-14 is 5730 years

Q: Iodine-131 has a half-life of 8.0 minutes. How many half lives will pass in 120 minutes?

A: Half life is defined as the time required for a substance to reduce to half of it's initial…

Q: Phosphorus-32 is a radioisotope used to detect certain types of tumors. P-32 has an effective…

A: Phosphorus-32 is a radioisotope used to detect certain types of tumours. P-32 has an effective…

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.