Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.15 mg sample of Pu−236  to decay to 0.160 mg?   Express your answer using three significant figures.

Q: The half-life of bismuth-210, 210Bi, is 5 days.(a) If a sample has a mass of 200 mg, find the amount…

A: Solution-  (a)-The half life periods of Bismuth-210 is 5days.the rate of decay of any substance…

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: bromine-88 is radioactive and has a half life of 16.3 seconds. how long would it take a sample to…

A: Applying concept of radioactive decay as first order reaction.

Q: Iodine-131 has a half-life of 8.0 days. How long will it take 10 µg of 131I to decrease to 1/100 of…

A:

Q: Co-60 is used extensively in radiotherapy as a source of y-rays. Its half life is 5.27years. a) How…

A: half life = 5.27 years

Q: Barium-142 is an beta emitter with a half-life of 11.0 min. If we start with 2.500 g of 142Ba, what…

A: The number of half-lives (n) can be calculated as

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

A:

Q: You have a sample of unknown medication that is radioactive. You believe you should be able to…

A: Given: The initial activity, (A0) = 1.14×106 Bq. The activity after 11.1 hrs, (A) =  6.60×105 Bq.…

Q: Hi, please help with this questions attached. Especially 1b, and number 2 and 3 thank you, Janet.

A: Hey, since there are multiple questions posted, we will answer first question (1b). If you want any…

Q: A radioactive isotope has a half-life of 84.3 minutes. How long will it take for the radiation from…

A:

Q: Moonrock collected by a US Apollo mission is estimated to be 4.30 billion years old by uranium/ lead…

A:

Q: 7) Aluminum-29 decays to a silicon-29 nuclide with a half-life of 6.56 minutes. What percent of an…

A: Given -  Half life=6.56minutes Time=18minutes

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: 1. Phosphorous - 32 has a half - life of 14 days.  After how many days will a 1000 mg sample decay…

A:

Q: 1. A 1 kg mass of radioactive material was left to decay in a laboratory. After 12 years, the…

A:

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: The half-life of radium-226 is 1600 years. How long will it take for 10.0 mg of radium-226 to decay…

A:

Q: Enter your answer in the provided box. A rock sample originally contains 3.32 mg of 43°U. How much…

A:

Q: Radium-226 (atomic mass = 226.025402 amu) decays to radon-224 (a radioactive gas) with a half-life…

A: First, decay constant value is determined using given half life value.

Q: The half-life of Po-218 is 3.05 minutes. How many minutes does it take for a sample of Po-218 to…

A: Given: Half-life of Po-218 = 3.05 minutes. And the final amount of Po-218 isotope remaining = 2.35 %…

Q: The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25…

A: We have given that The beta decay of cesium-137 has a half-life of 30.0 years. How many years must…

Q: days. Suppose the initial amount of Thorium-234 is 192.9 mg, find the amount of Thorium-234 remains…

A:

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: 60Co has a half-life of 5.27 yr. What percentage of its original activity will a sample of 60Co have…

A: Dear student,I am providing solution for Q.1 that you have asked as we are entitled to do one…

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

A:

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: Francium-223 is a radioactive isotope with a half-life of about 22 minutes. How much time will it…

A:

Q: 1. If the amount of the parent isotope in the original sample of a rock had been 48 grams, about how…

A:

Q: 1) Phosphorus-32 has a half-life of 14.0  days . Starting with 4.00  g  of  32P , how many grams…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The iodine-131 nuclide has a half-life of 8.0 days. If you originally have a sample containing 728-g…

A: Known: Half-life  = 8.0 days Original mass = 728 g Time elapsed = 6.86 weeks = (6.86 ×7)…

Q: Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137…

A: Concept based on half-life of radio active isotopes.

Q: Which radioactive isotope would take the least Radioactive isotope Half-life of time to become…

A: Radioactive disintegration of unstable nuclei is for attaining stability. Lower the half life, least…

Q: Cobalt-60 is commonly used as a source of beta-particles. How long does it take for 87.5 perxent of…

A: The decay reactions first order reactions. Since we know that the relationship between the amount of…

Q: After 40.0 days, how much Ac-225 remains if the starting mass was 94.0 g? Ac-225 has a half life of…

A:

Q: Suppose a certain radioactive substance has a half-life of 2 years. Find how long it will take for…

A: Half life is the time of the reaction in which the reaction is 50% completed. Write the expression…

Q: One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703…

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

Q: 1. After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: A sample of F-18 has an initial decay rate of 1.5 x 10° dis/s. How long will it take for the decay…

A: When an atomic nucleus breaks down by itself that results in the release of energy and matter, such…

Q: A sample of F-18 has an initial decay rate of 1.5 × 10^5/s. How long will it take for the decay rate…

A: Radioactive decay is a first-order decay process.Given, half-life of F-18, t1/2 = 1.83 hours.Initial…

Q: A radioactive isotope has a half-life of 84.5 minutes. How long will it take for the radiation from…

A: Half life t1/2 = 84.5 min = 5070 s

Q: The radioactive isotope *Pa decays by beta emission. 234 If the mass of a sample of protactinium-234…

A: Initial mass of isotope M = 83.5 ug Final mass of isotope M' = 20.9 ug  Time of decay t = 13.5 hours…

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

A:

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

A: The spontaneous disintegration of alpha, beta and gamma radiations by a substance irrespective of…

Q: The cesium-137 nuclide has a half-life of 30 years. After 90 years, about 10 g remains. The original…

A: Radioactive decay follow first order kinetics. Half life of Ce is 30 yrs. Mass of original sample =…

Q: a. i. The half-life of 20 kg of Bismuth -210 is 20 minutes. Explain this statement? ii. A…

A: The half-life of 20 kg of Bismuth -210 is 20 minutes means after every 20mints the concentration of…

Q: radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013…

A: We have to find half -life of nuclide

Q: Strontium-89 is a beta emitter with a half-life of 50.6 days that is used in bone cancer treatment.…

A: Radioactive decay follows first order kinetics. t1/2 = 0.693/k   (where, k = decay constant) t =…

Q: Hydrogen-3 is radioactive and has a half life of 12.3 years. How long would it take a sample to…

A: Given that -  Hydrogen-3 is tritium which is a radioactive isotope with half life = 12.3 years…

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.