5.4.141 - Spontaneous and random nuclear decay

Understand the spontaneous and random nature of nuclear decay.

Use - spontaneous and random nuclear decay to connect the rule to the data and decision in the question.

This matters because - spontaneous and random nuclear decay determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - spontaneous and random nuclear decay to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Spontaneous and random nuclear decay is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.