We must first calculate the mass defect (Am) for 56Fe. Since atomic masses (which include the electrons) are given, we must decide how to account for the electron mass: 55.9349 = mass of 56 Fe atom = mass of nucleus + 26 m. 1.0078 = mass of H atom = mass of nucleus + m, Thus, since a 56Fe nucleus is "synthesized" from 26 protons and 30 neutrons, we see that Am = (55.9349 - 26 m.) - [26(1.0078 - ma) + 30(1.0087)]. Solve for Am. Am = 0.5289 amu
We must first calculate the mass defect (Am) for 56Fe. Since atomic masses (which include the electrons) are given, we must decide how to account for the electron mass: 55.9349 = mass of 56 Fe atom = mass of nucleus + 26 m. 1.0078 = mass of H atom = mass of nucleus + m, Thus, since a 56Fe nucleus is "synthesized" from 26 protons and 30 neutrons, we see that Am = (55.9349 - 26 m.) - [26(1.0078 - ma) + 30(1.0087)]. Solve for Am. Am = 0.5289 amu
Chapter10: Radioactivity And Nuclear Processes
Section: Chapter Questions
Problem 10.8E
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![We must first calculate the mass defect (Am) for 56Fe. Since atomic masses (which include the electrons) are given, we must decide how to account for the electron mass:
55.9349 = mass of 56 Fe atom = mass of nucleus + 26 m.
1.0078 = mass of H atom = mass of nucleus + me
Thus, since a 56Fe nucleus is "synthesized" from 26 protons and 30 neutrons, we see that Am = (55.9349 - 26 m2) - [26(1.0078 - ma) + 30(1.0087)].
Solve for Am.
Am = 0.5289
amu](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb4a2eb24-a6c1-43e7-a362-31fbb5a77491%2F6b31fc19-a816-4348-8314-1dfd55197a73%2Fd4fhaf_processed.png&w=3840&q=75)
Transcribed Image Text:We must first calculate the mass defect (Am) for 56Fe. Since atomic masses (which include the electrons) are given, we must decide how to account for the electron mass:
55.9349 = mass of 56 Fe atom = mass of nucleus + 26 m.
1.0078 = mass of H atom = mass of nucleus + me
Thus, since a 56Fe nucleus is "synthesized" from 26 protons and 30 neutrons, we see that Am = (55.9349 - 26 m2) - [26(1.0078 - ma) + 30(1.0087)].
Solve for Am.
Am = 0.5289
amu
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