Binding Energy Is the Missing Rest Budget

Binding energy is taught as an exact before-minus-after ledger. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

4 nucleons at 5 joules each make a free budget of 20 joules.

4\times5=20

Binding per nucleon stays fractional

The bound proxy is 17 joules, so binding is 3 joules, or three fourths of a joule per nucleon.

20-17=3\quad 3\div4=\tfrac{3}{4}