Questions
A nucleus has mass represented by M(A,Z) . If denote the mass of proton and neutron respectively and B E the binding energy (in MeV), then:
detailed solution
Correct option is B
In the case of formation of a nucleus the evolution of energy equal to the binding energy of the nucleus takes place due to disappearance of a fraction of the total mass. If the quantity of mass disappearing is ∆M. then the binding energy iSBE=∆Mc2From the above discussion, it is clear that the mass of the nucleus must be less than the sum of the masses of the constituent neutrons and protons. We can then write∆M=ZMp+NMp-M(A,Z)Where M(A,Z) is the mass of the atom of mass number A and atomic number Z. Hence, the binding energy of the nucleus is BE=ZMp+NMn-M(A,Z)c2 BE=ZMp+(A-Z)Mn-M(A,Z)c2Where N = A - Z = Number of neutrons.Talk to our academic expert!
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In a fission reaction the binding energy per nucleon of X and Y is 8.5 MeV where as of is 7.6 MeV. The total energy liberated will be about
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