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MInbox-woodlo x -Topic Unit1 5 D × B Pearson-Perfo x watch Modern x . Cengage × /wwz l online × G Chegg Study I c I gallam >G sjc cengagenow.com/ilrn/takeAssignment takeCovalent Activity do?locator-assignment take&takeAssignmentSessionLocator;=assignment take ::: Apps Can as 'CengageNow n @ MyMathLab Pearso Webadvisor @ Pearson REVEL English-101c a Rentals Cart D Formula name searc Wolfram Alpha Nuclear Chemistry- Introduction-Chapter 19 [Review Topics] 1. Radioactivity 3 pts M Uise the References to access important values if needed for this question. 2 Nuclear Reaction: identity Decay R3pts What is the binding energy in kJ/mol Li for lithium-7? kJ/mol 3. Nuclear Reaction: Predict Decay Pr.. 3 ptsM The required masses (g/mol) are: IH-1.00783 ;On= 1.00867: Li = 7.01 600 4 pts 2req 5. Radionuclides in Medical Imaging 2 pts 2req 5 pts 2req 6. Binding Energy Submit Answer Retry Entire Group 9 more group attempts remaining Question Question

Explanation / Answer

Mass defect , m = ( ZMH + (A-Z) M n ) - M

Where

Z = atomic number = 3

(A-Z) = No. of neutrons = 7-3=4

MH = mass of Hydrogen atom = 1.00783 amu

M n = mass of Neutron = 1.00867 amu

M = real mass = 7.01600 amu

Plug the values we get m = [( 3x1.00783)+(4x1.00867 )] - 7.01600

= 0.04217 amu

So nuclear binding energy , BE = m x 931.5 MeV

                                             = 0.04217 x931.5 MeV

                                               = 39.2813 MeV

                                               = 39.2813 x 109 eV

                                               = 39.2813 x 109 x 1.6x10-19 J

                                               = 6.285 x 10-8 J/mol

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