Question

all the mass of an atom is converted in the nucleus​

Answer 1

Calculate the mass defect and nuclear binding energy of an atom ... The binding energy of nuclei is always a positive number, since all nuclei require net energy to ... To convert to joules per nucleon, simply divide by the number of nucleons.

Answer 2

Answer:

some mass is converted into energy as the nucleus is formed. Hence the nucleus has less mass than the particles it was made from. This is the mass defect. Put another way; as the particles come together to form the nucleus, they lose potential energy.

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