define mass defect, binding energy and binding energy per nucleon.
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It takes energy, called binding energy, to hold nucleons together as a nucleus. ... Elements with lower and higher mass numbers per nucleon are less stable. The total mass of a nucleus is less than the total mass of the nucleons that make up the nucleus. This difference is known as the mass defect.
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Answer: As a nucleus is made up of neutrons and protons, there are forces of repulsion between the positive charges of the protons. It takes energy, called binding energy, to hold nucleons together as a nucleus. ... This difference in mass, the mass defect, is the binding energy that is released.
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