Question

Fission of nuclei is possible because binding energy per nucleon in them :

• A. increases with mass number at low mass number
• B. increases with mass number at high mass number
• C. decreases with mass number at low mass number
• D. decreases with mass number at high mass number

Answer 1

The correct option is D decreases with mass number at high mass number

Binding energy per nucleons decreases with increase in mass numbers.
The decrease of binding energy per nucleon for nuclei with a high mass number is due to increased Coulombic repulsion between protons inside the nucleus.