Use the half-life information to complete each table. (The formula N = Nnekt is not required.) (a) Uranium-228: half-life = 550 sec t (sec) 1100 550 1650 2200 N (9) 8 (b) Uranium-238: half-life = 4.9 x 10° years t (yr) N (g) 10 5 2.5 1.25 0.625

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: 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: (b) What mass (in g) of 24Na produces 7.0 mci activity, given its half-life is 15.0 h? Additional…

A:

Q: Gold-198 is used in the diagnosis of liver problems. If the half-life of Au-198 is 2.69 days: b. If…

A: Half life = 2.69 day Initial amount = 9.21 mg  Time = 72.9 days

Q: A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.(a)…

A:

Q: 40K decays to 40Ar with a half life of 1.27x10^9 years. What is the age of a rock in which the…

A: Recall the expression of remaining amount due to radioactive disintegration Remaining amountA=A∘2nSo…

Q: A sample of TI-201 has an initial decay rate of 5.88 x 10' dis/s. How long will it take for the…

A:

Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half-life is 4.01x10° vears.

A: To determine the amount of 0.15 g radioactive substance left after 3200 years if the half-life is…

Q: Co-60 is used extensively in radiotherapy. Its half-life is 5.27 years. How many years will it take…

A:

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

A:

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: Predict the mode of decay of (a) plutonium-239, (b) indium-12o?

A: Pu-239 undergoes alpha decay and forms U-235. Alpha decay leads to decrease in atomic number by 2…

Q: CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years.…

A:

Q: Yttrium-90 is a radioactive isotope used to treat tumors in the liver. 90 Y has a half-life of 2.67…

A: Given : Half life of 90Y = 2.67 days. And mass of 90Y remaining after 1.03 days = 4.02 µg

Q: Suppose the amount of a certain radioactive substance in a sample decays from 9.40mg to 5.40mg over…

A: Radioactive decay is the first order decay. the formula for calculation of radioactive decay as…

Q: (Q111) In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.…

A:

Q: Charcoal samples from Stonehenge in England were burned in the presence of oxygen with the resulting…

A:

Q: The isotope 100 Tc has a half life of 16 sec, what is the radioactive decay constant, k?

A: Given: Half life of isotope 100Tc = 16sec As all radioactive process are first order reactions using…

Q: A 2.5 gram sample of an isotope of strontium-90 was formed in a 1960 explosion of an atomic bomb at…

A: GIVEN:  To Find: Solution: As we know, For First order decay

Q: 8. For the radioactive nuclides in table 7.1, which one has the largest value of the decay constant?…

A: The question it is asked that among the four radioactive atoms which atom have higher value of decay…

Q: Initial Amount After Half-life (years) Isotope Оuantity 1000 Years 33. 226RA 1599 10 g 94. e 5715…

A: in radioactivity is defined as unstable nuclei is decay into stable nuclei and emits electromagnetic…

Q: The ratio between the number of tritium (13T; radio active isotope of hydrogen) and the naturally…

A:

Q: 2P is a radioactive isotope with a half-life of 14.3 days. If you currently have 13.5 g of ²P, how…

A: The given data contains, t1/2 =14.3 daysPt=13.5 gP0=7 days

Q: 11. Plutonium 239PU is an unstable nuclei and decays with a half-life r= 2.4 x 104 years by…

A: Heavy unstable nuclei undergo radioactive decay process to form stable elements. The decay process…

Q: The radioactive nuclide 60Co as a half-life of 5.27 years. Calculate the mass (in g) of "Co that…

A: Formula: N=Noe-λt

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

A: Radioactive decomposition follows first order kinetics. Integrated rate law for first order is

Q: Bromine-88 is radioactive and has a half life of 16.3 seconds. What percentage of a sample would be…

A: Given,Half-life of Bromine-88 = 16.3 seconds.Percentage of sample left after 74.8 seconds has to be…

Q: A sample of uranium ore emits α radiation characteristic of 235U at a rate of 9.3X105 decays/s. What…

A: The expression of average life time is shown below: where; t1/2 = half life time = average life…

Q: The hydride of an unstable nuclide of a Group IIA metal, MH2 , decays by α-emission. A 0.025 mol…

A:

Q: A 1.50-L gas sample at 745 mm Hg and 25.0° C contains 3.55% radon-220 by volume. Radon-220 is an…

A: In the gas sample, volume of radon-220,V = 1.50 x 0.0355 = 0.053 L.

Q: Neptunium-237 has a half-life of 2.1 million years. The amount N of 400 kilograms of neptunium-237…

A: Exponential decay According to decay law, it calculates the amount of undecayed nuclei in a…

Q: 239Pu is a nuclear waste byproduct with a half-life of 24,000 y. What fraction of the 239Pu present…

A: Given data, t1/2 of P239u = 24,000 yTime (t) = 1000 years To calculate the fraction of the 239Pu…

Q: Americium-241 (241Am) is a synthetic isotope used in smoke detectors. It undergoes alpha decay to…

A: Given: Half-life of isotope = 432.2 years. Initial mass of isotope = 0.30 µg And time passed = 70…

Q: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

A: Radioactive decay follows first order rate law, we can mathematically expressed it as At = Ao…

Q: The half-life of strontium−90 is 29.1 years. Calculate the radioactivity in millicuries of 11.5 mg…

A: Given, Half life of strontium, t1/2 = 29.1 yr Mass of strontium = 11.5 mg = 0.0115 g    (1 mg =…

Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 30.9 g of "P, how…

A: The given information is: Half-life = 14.3 days Mass of 32P currently present = 30.9 g Since it is a…

Q: very unstable francium-221 is produced. Giver f-life of francium-221 is only 5.00 minutes, if th…

A: Given,  Half life time (t1/2) = 5.00 minutes Decay constant (k) = 0.693/5.00     =  0.1386 min-1…

Q: What is the half‑life of an isotope that decays to 3.125%3.125% of its original activity in 41.8 h?

A: All radioactive decay follows first order kinetics. The half-life t1/2 of the radioactive decay is…

Q: lement X decays radioactively with a half life of 8 minutes. If there are 530 grams of lement X, how…

A: Given: The half life of the sample, (t1/2)=8 minutes. The initial amount of sample, (N0)=530 grams.…

Q: Ruthenium-106 (^ 106 Ru) is used to treat melanoma in the eye. This isotope decays by Beta ^- with a…

A: Ru has an atomic number 44 and has seven stable isotopes.27 radioactive isotopes are present.106Ru…

Q: If there is 9 umol of the radioactive isotope 32P (half-life 11 days) at t=0, how much 32 P will…

A:

Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 91.3 g of ²P, how…

A: The answer to the following question is- half life = 14.3 days ,

Q: You take a course in archacology that includes field work. An ancient wooden totem pole is excavated…

A: The above question can be solved using the formula  t1/2 = 0.693/k Where k is the rate constant k=…

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.