7. (a) Compute the Q values for the decays 224Ra → 212 pb + 12C and224 Ra→ 210 Pb + 14C. (b) Estimate the half-lives for these two possible decayprocesses. 24Ra is an ¤ emitter with a half-life of 3.66 days.

GIVEN REACTION: 224Ra →210Pb + 14C Atomic Mass of 224Ra = 224.020 a.m.u Atomic Mass of 210Pb =…

Answered: 224 Ra прис -> 210 Pb + ¹4C. (b)…

Science

Chemistry

224 Ra прис -> 210 Pb + ¹4C. (b) Estimate the half-lives for these two possible decay

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Q represent a mass (in grams) of carbon , whose half-life is 5715 years. The quantity of 1 carbon 14 present after t years is Q = 10() t/5715 How long will it take until only 4 grams2remain? how do I do this and what equation do I use?
Americium-241 (241Am) is a synthetic isotope used in smoke detectors. It undergoes alpha decay to neptunium-237 (237Np) with half life of 432.2 years An absolutely tiny initial mass of 241Am is used in typical smoke detector; 0.30 micrograms (0.00000030g) How many micrograms 241-Am will remain after 70 years? Report your answer to 2 significant figures
(A). Sodium-24 has a decay constant of 4.63 x 10-2 h-1. What is its half life? (B) The half life of radon-222 is 3.823 days. What is its decay constant?
A decay sequence for a radioactive atom of radon 219 to stable lead 207 atom is as shown below. (i.) What particle is emitted when 21183Bi is decays?(ii.) What happens within the nucleus to cause this decay?(iii) The half-life of 21986Pb is 4.0s. At time t = 20 s, what fraction of radon atoms present at time t = 0, will be undecayed?
The radioactive isotope 212pb has a half-life of 10.64 h. A sample containing this isotope has an initial activity (t = 0) of 55.0 pCi. Calculate the number of nuclei that decay in tl time interval between t, = 7.0 h and t, = 15.0 h. nuclei
This experiment will use a technique known as neutron activation analysis (NAA) to determine the half-lives of two unusual isotopes, 28 Al and 20F. The only stable isotopes of these elements are 27 Al and 19F. Trace amounts of 26 Al and 18F occur naturally, but the isotopes we will generate today are even more unstable and have no significant natural abundance. To produce these very unstable isotopes in measurable concentration, samples containing Al and F are placed next to a source of energetic neutrons. A number of neutron sources can be used; in this lab the samples are placed inside an operating nuclear reactor that emits energetic neutrons. This source has the advantage of a high neutron output that creates the desired isotopes rapidly and at higher concentrations, but it is only feasible for researchers that have access to nuclear reactors. At Oregon State University, the campus TRIGA reactor is set up for NAA experiments. SECTION 2 Based on the description from the last…
An unknown radioactive element decays into non-radioactive substances. In 440440 days the radioactivity of a sample decreases by 3737 percent.(a) What is the half-life of the element?half-life: (days)(b) How long will it take for a sample of 100100 mg to decay to 6060 mg?time needed: (days)
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) 550 1100 1650 2200 N (g) (b) Uranium-238: half-life = 4.9 x 10 years t (yr) N (g) 0.625 10 2.5 1.25
Strontium-90 is a radioactive material that decays according to the function A(t)=A0e−0.0244t, where A0 is the initial amount present and A is the amount present at time t (in years). Assume that a scientist has a sample of 500 grams ofstrontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 40years? (c) When will only 300 grams of strontium-90 be left? (d) What is the half-life of strontium-90?
A patient swallows a radiopharmaceutical tagged with phosphorus-32 15 a B- emitter with a half-life of 14.3 days. The average kinetic energy of the emitted electrons is 700 keV. The initial activity of the sample is 1.31 MBq. (a) What is the number of electrons emitted in a 7.5 day period? electrons (b) What is the total energy deposited in the body during the 7.5 days? (c) What is the absorbed dose if the electrons are completely absorbed in 216 g of tissue? rad