23.1.3—The terms mass defect and binding energy

define and use the terms mass defect and binding energy.

Use —the terms mass defect and binding energy to connect the rule to the data and decision in the question.

This matters because —the terms mass defect and binding energy determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the terms mass defect and binding energy to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The terms mass defect and binding energy is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.