Binding energy

Definition

Binding energy is the energy required to disassemble a nucleus into its constituent protons and neutrons. It is a measure of the stability of a nucleus; the higher the binding energy, the more stable the nucleus.

5 Must Know Facts For Your Next Test

1. Binding energy per nucleon is highest for iron-56, making it one of the most stable nuclei.
2. In nuclear fusion, light nuclei combine to form a heavier nucleus, releasing binding energy.
3. In nuclear fission, a heavy nucleus splits into smaller nuclei, also releasing binding energy.
4. The mass defect in a nucleus is converted to binding energy according to Einstein's equation E=mc^2.
5. The Sun generates energy through nuclear fusion processes that convert hydrogen into helium and release binding energy.

Review Questions

• What does binding energy indicate about the stability of a nucleus?
• How is binding energy related to both nuclear fusion and fission?
• Why is iron-56 considered one of the most stable nuclei based on binding energy?

Related terms

Mass Defect:

The difference between the mass of an atomic nucleus and its constituent protons and neutrons.

Nuclear Fusion:

A nuclear reaction where light nuclei combine to form a heavier nucleus with the release of energy.

Nuclear Fission: A nuclear reaction where a heavy nucleus splits into smaller nuclei with the release of energy.