If the mass of proton = 1.008
a.M.U. And mass of neutron = 1.009
a.M.U. Then binding energy per nucleon for 4be94be9 ( mass = 9.012 amu) would be
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Mass defect is -
Δm=[Zmp+(A−Z)mn−M]
Therefore:
Δm=4Mp +(9−4)Mn−MBe
=(4×1.008+5×1.009−9.012)Amu
=0.065Amu
So Binding energy of Be = Δm×931.5Mev
=.065×931.5Mev
=60.5475Mev
Or the binding energy per nucleon will be : Be/Nucleon
= 60.5475/9
=6.7275 Mev
Therefore the binding energy per nucleon for 4Be9 is 6.725 Mev
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