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Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are formed and the carbon atoms are obtained. If the entire process takes 3 half-lives, what percentage of the carbon-11 remains at this time?

Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are formed and the carbon atoms are obtained. If the entire process takes 3 half-lives, what percentage of the carbon-11 remains at this time?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are formed and the carbon atoms are then incorporated into an appropriate compound. The resulting sample is injected into a patient and the medical image obtained. If the entire process takes 3 half-lives, what percentage of the carbon-11 remains at this time? Enter values only with 2 decimal places
Transcribed Image Text:Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are formed and the carbon atoms are then incorporated into an appropriate compound. The resulting sample is injected into a patient and the medical image obtained. If the entire process takes 3 half-lives, what percentage of the carbon-11 remains at this time? Enter values only with 2 decimal places
Periodic table of the elements Alkali metals Halogens Alkaline-earth metals Noble gases group 1* 18 Rare-earth elements (21, 39, 57–71) and lanthanoid elements (57-71 only) Transition metals 1 1 H Other metals 2 13 14 15 16 17 Не Other nonmetals Actinoid elements 6. 3 2 Li 4 7 8. 10 Ве B C N F Ne 18 11 3 Na Mg 12 13 14 15 16 17 3 4 5 6 7 8 9 10 11 12 AI Si S CI Ar 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 37 5 Rb 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Sr Y Zr Nb Мо Tc Ru Rh Pd Ag Cd Sn Sb Te 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 s Ba La Hf Ta w Re Os Ir Pt Pb Bi Та Au Hg TI Ро At Rn 88 110 87 7 Fr 89 104 105 106 107 108 109 111 112 113 114 115 116 117 118 Ra Ac Rf Db Bh Hs Mt Ds Rg Cn Nh Mc Lv Ts Og 58 lanthanoid series 6 63 64 66 68 59 60 61 62 65 67 69 70 71 Се Pr Nd Pm Sm Eu Gd Tb Dy Но Er Tm Yb Lu 90 actinoid series 7 92 93 96 99 100 101 91 94 95 97 98 102 103 Th Ра U Pu Am Cm Bk Cf Es Fm Md No Lr *Numbering system adopted by the International Union of Pure and Applied Chemistry (IUPAC). © Encyclopædia Britannica, Inc. 19 LO CO period
Transcribed Image Text:Periodic table of the elements Alkali metals Halogens Alkaline-earth metals Noble gases group 1* 18 Rare-earth elements (21, 39, 57–71) and lanthanoid elements (57-71 only) Transition metals 1 1 H Other metals 2 13 14 15 16 17 Не Other nonmetals Actinoid elements 6. 3 2 Li 4 7 8. 10 Ве B C N F Ne 18 11 3 Na Mg 12 13 14 15 16 17 3 4 5 6 7 8 9 10 11 12 AI Si S CI Ar 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 37 5 Rb 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Sr Y Zr Nb Мо Tc Ru Rh Pd Ag Cd Sn Sb Te 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 s Ba La Hf Ta w Re Os Ir Pt Pb Bi Та Au Hg TI Ро At Rn 88 110 87 7 Fr 89 104 105 106 107 108 109 111 112 113 114 115 116 117 118 Ra Ac Rf Db Bh Hs Mt Ds Rg Cn Nh Mc Lv Ts Og 58 lanthanoid series 6 63 64 66 68 59 60 61 62 65 67 69 70 71 Се Pr Nd Pm Sm Eu Gd Tb Dy Но Er Tm Yb Lu 90 actinoid series 7 92 93 96 99 100 101 91 94 95 97 98 102 103 Th Ра U Pu Am Cm Bk Cf Es Fm Md No Lr *Numbering system adopted by the International Union of Pure and Applied Chemistry (IUPAC). © Encyclopædia Britannica, Inc. 19 LO CO period
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