Nuclear Binding Energy refers to the energy required to keep nucleons held together in the nucleus. Which option correctly describes this?

Nuclear Binding Energy refers to the energy required to keep nucleons held together in the nucleus. Which option correctly describes this?

• A. Energy released when chemical bonds break
• B. Energy required to keep protons and neutrons held together in the nucleus
• C. Energy produced by chemical reactions
• D. Energy stored in atomic bonds in the electron cloud

Answer: (B)

The main idea is what binding energy means for a nucleus: it is the energy you must supply to break a nucleus into its individual protons and neutrons. This describes the strength of the nuclear force holding nucleons together. The described statement—energy required to keep protons and neutrons held together in the nucleus—fits exactly, since disassembling the nucleus requires that energy. This is different from chemical bond energy, which involves electrons and atoms (measured in eV per bond) and not the nucleus itself. Nuclear binding energy is typically in MeV per nucleon, and the energy released when a nucleus forms equals its binding energy (via mass defect and E=mc^2).

The main idea is what binding energy means for a nucleus: it is the energy you must supply to break a nucleus into its individual protons and neutrons. This describes the strength of the nuclear force holding nucleons together. The described statement—energy required to keep protons and neutrons held together in the nucleus—fits exactly, since disassembling the nucleus requires that energy. This is different from chemical bond energy, which involves electrons and atoms (measured in eV per bond) and not the nucleus itself. Nuclear binding energy is typically in MeV per nucleon, and the energy released when a nucleus forms equals its binding energy (via mass defect and E=mc^2).