Question 1

What is Binding Energy per Nucleon?

Accepted Answer

Binding energy is the energy needed to disassemble a nucleus into its constituent protons and neutrons.

Question 2

Binding Energy per Nucleon — key concept 2

Accepted Answer

Equivalently, it is the ENERGY RELEASED when free nucleons assemble into a nucleus (mass-energy equivalence).

Question 3

Binding Energy per Nucleon — key concept 3

Accepted Answer

Mass defect: Δm = Zm_p + (A−Z)m_n − m_nucleus. The nucleus weighs LESS than its parts.

Question 4

Binding Energy per Nucleon — key concept 4

Accepted Answer

Binding energy: B = Δm · c². Often quoted in MeV using 1 u = 931.5 MeV/c².

Question 5

Binding Energy per Nucleon — key concept 5

Accepted Answer

Binding energy per nucleon B/A is the most useful quantity: nuclei with larger B/A are more stable.

Question 6

Binding Energy per Nucleon — key concept 6

Accepted Answer

B/A peaks at A ≈ 56 (Fe-56, Ni-62) with ~8.8 MeV/nucleon. Falls off for heavier and lighter nuclei.

Binding Energy per Nucleon

Key Notes