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lec27_Supplemental

# lec27_Supplemental - Quiz December 5 2010 Final Exam...

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12/7/11 1 Final Exam : Tuesday December 13, 2011 from 7:00 PM to 9:00 PM NOTE THAT FEW EQUATIONS WILL BE GIVEN – YOU ARE REMINDED THAT IT IS YOUR RESPONSIBILITY TO CREATE WHATEVER TWO-SIDED CRIB SHEET YOU WANT TO BRING TO THIS EXAM. *Covers all readings, lectures, homework from Chapters 25, 27 through 30 *Location: Stewart 183 Be sure to bring your student ID card, calculator, pencil and three one-page (two- side) crib sheet. 12/7/11 2 Quiz: December 5, 2010 An electron in an atom of gold is in a state with n=4 . Which of these values of l are possible for it: -3, 0, 2, 3, 4, 5 (A) 3, 4, 5 (B) -3, 0, 2, 3, 4 (C) -3, 0, 2, 3 (D) 0, 2, 3 (E)All of them 12/7/11 3 Structure of the Nucleus 2 4 He A=mass number Z=atomic number element Nucleus = neutrons + protons Z = atomic number = number of protons N =number of neutrons A =atomic mass number (nucleon number) A= Z + N 12/7/11 4 Mass of Nucleons about 1800 times that of the electron

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12/7/11 5 Mass & Energy Scales in Nuclear Physics E = mc 2 E p m p c 2 = 938 MeV m p = 938 MeV c 2 1 u = 1.66 x 10 ! 27 kg = 931.5 MeV c 2 atomic mass unit which is 1/12 of the mass of a carbon atom C12 6 mass of a proton 12/7/11 6 Isotopes 2 4 He 2 3 He 2 6 He 12/7/11 7 Size of the Nucleus 3 7 Li 1 femtometer = 10 -15 m 50,000 times smaller than an atom Approximately spherical r = r o A 1 3 A = r r o ! " # \$ % & 3 A is proportional to the volume of the sphere. As A increases, the radius of the nuclear sphere increases. 12/7/11 8 Size of the Nucleus A = r r o !
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lec27_Supplemental - Quiz December 5 2010 Final Exam...

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