Question

The isotope Cobalt-60 has a nuclear mass of 59.933820 u
Calculate the Mass Defect of Cobalt-60 using the following information.
Mass of Proton: 1.007825 u
Mass of Neutron: 1.008665 u
1 u = 931.5 MeV

Answer 1

You need to add up the masses of the protons (27*1.007825 u) and neutrons (33*1.008665 u) to find the total theoretical mass. Then, you subtract the nuclear mass (59.933820 u) from that value to get the mass defect. Next, multiply this number by the energy conversion factor (931.5 MeV) and you will have the energy, your final answer.

I got 524.6 MeV