The number of mass = 141 and the atomic number, Z = 56.
The number of neutrons, N = 141 - 56 = 85.
Mass of proton = 1.00727647 amu
Mass of neutron = 1.0086654 amu
The total mass of the isotope:
mtotal = (56)(1.00727647) + (85)(1.0086654) = 142.144 amu
The nuclear mass of 141 Ba is 140.883 amu. Calculate the Binding energy per nucleon for 141 Ba.
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