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Calculate the mass defect. To successfully calculate the mass defect associated

ID: 842051 • Letter: C

Question

Calculate the mass defect.

To successfully calculate the mass defect associated with the 19F nucleus.

Mass Defect is defined as the difference between the mass of an atom and the total mass of its protons, neutrons, and electrons. In the following problem, you will work through the calculation of the mass defect associated with the 199F nucleus.

Calculate the total mass of the protons and electrons in 919F Use 1.007825 a mu as the mass of 11H (mass of a proton and an electron). Express your answer in atomic mass units to 6 significant figures. Calculate the total mass of the neutrons in 919F Use 1.008665 a mu as the mass of 01n (mass of a neutron). Express your answer in atomic mass units to 7 significant figures. Calculate the mass defect of 919F Use 18.9984 a mu as the actual mass of 919F Express your answer in atomic mass units to the fourth decimal place.

Explanation / Answer

A. No of electron and proton=9

                Mass of electron and proton=9*mass of 11H

                                                                                =9*1.007825

                                                                                =9.070425 amu

B. No of neutron=19-9=10

                Mass of neutron=10*1.008665

                                                =10.08665 amu

B. Mass defect=Mass of atom-[Mass of neutron+mass of proton]

                                =18.9984-[9.07042+10.08662]

                                =0.1587 amu

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