For very light elements like Hydrogen, the binding energy is low but increases sharply as mass number increases. This steep gradient explains why nuclear fusion (combining light nuclei) releases a massive amount of energy.
), indicating that nuclear forces are "saturated" in mid-sized nuclei. The curve of binding energy
. Nuclei in this "iron peak" (notably and Nickel-62 ) are the most tightly bound and stable in the universe. For very light elements like Hydrogen, the binding
The curve of binding energy is a graph that plots against the atomic mass number ( For very light elements like Hydrogen
Beyond iron, the binding energy per nucleon gradually decreases. This happens because the repulsive electrostatic force between protons begins to overcome the short-range strong nuclear force. Saturation Region: Between mass numbers , the binding energy is relatively constant (around
) . It illustrates the stability of atomic nuclei and explains why certain nuclear reactions—like fusion and fission—release energy. Peak Stability: The curve peaks around a mass number of to
Light nuclei move "up" the curve to become more stable by fusing together. This process powers stars like our Sun.