4. Consider a fictional radioisotope X (311.1766 amu)a, If a 0.750 g sample of X-311 releases 5.75 x 1016 alpha particles in 7.5 minutes, what is the half-life?b. If a sample initially contains 34.5 mg of X-311, how much X-311 will remain after 17 minutes have passed (usethe half-life from part b to answer this question).C.What is the activity of 9.5 mg of X-311 (use the half-life from part b).

Answered: 4. Consider a fictional radioisotope X…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter2: Life's Chemical Basis

Section: Chapter Questions

Problem 3CT: Polonium is a rare element with 33 radioisotopes. The most common one, P210o, has 84 protons and 126...

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Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few inches of air. This property is one reason why authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po decay into after it emits an alpha particle?
If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is ______ years old. a. 15,000 b. 26,667 c. 30,000 d. 40,000
If there is 10 μmol of the radioactive isotope 32P (half-life 14 days) at t = 0, how much 32P will remain at (a) 7 days, (b) 14 days, (c) 21 days, and (d) 70 days?
8) Which of the following is NOT a use for isotopes discussed in class? a. Diagnosing Cancer b. Killing Cancer cells c. Explosive demolition d.Tracking environmental change
1. Which of the following electromagnetic waves has the longest wavelength? A.Infrared B.Ultraviolet C.Visible Light D.X-Ray 2.Which of the following electromagnetic waves has the shortest wavelength? A.Infrared B.Microwave C.Radio Wave D.X-Ray 3.In the visible spectrum, which color has the shortest wavelength? A.Blue B.Red C.Green D.Violet 4. Electromagnetic waves produced by _____. A.any distance B.currents C.vubrating charge D.voltage source 5. Which of the following has size comparable to the wavelength of microwave? A.Bacteria B.Coin C.Human D.Pin 6.This type of wave was discovered by famous astronomer Sir Frederick William Herschel. A.Infrared B.Microwave C.Radio Wave D.Visible Light 7. Which of the following EM waves has the least amount of energy? A.Gamma Ray B.Microwave C.Radio Wave D.X-Ray 8.Which among the following EM waves has the highest frequency among others? A.Infrared B.Microwave C.Ultraviolet D.X-Ray 9.What is the frequency range of ultraviolet radiation?…
1. What is the picture showing to us? Why did you say so? 2. Which instrument or device was used to capture the image ? Why ? 3.How is isotope related to the image?
The decay of an isotope element follows a first-order reaction. Assuming that you start with 964 mg of the isotope element sample, after 39.4 hours of decay, you find that there is 275 mg of the sample remaining. What is the half-life time of this reaction?
a 139 ng sample of radioactive material has a half life of 4.2 days how many ng of radioactive material is left after 3 half lives ?
7. What do we use to try and understand the state (and quantity) of nature? What are some challenges associated with using these measures?
Provide a brief definition and a description of the significance of the following terms in NMR spectroscopy (1) CW-NMR spectroscopy (2) the nuclear Overhauser effect (3) the free induction decay(4) a 90o pulse(5) J coupling(6) distance geometry(7) intermediate exchange(8) SAR by NMR(9) the Larmour frequency(10) residual dipolar couplings
Polonium is a rare element with 33 radioisotopes. The most common one, P210o, has 84 protons and 126 neutrons. When P210o decays, it emits an alpha particle, which is a helium nucleus 2 protons and 2 neutrons. P210o decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. For example, they can be stopped by a single sheet of paper or a few inches of air. That is one reason why authorities failed to discover toxic amounts of P210o in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of P210o change into after it emits an alpha particle.
Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. For example, they can be stopped by a single sheet of paper or a few inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po become after it emits an alpha particle?

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