2.9—An orbital is a region within an atom that can hold up to two electrons with opposite spins

Know that an orbital is a region within an atom that can hold up to two electrons with opposite spins.

Use —an orbital is a region within an atom that can hold up to two electrons with opposite spins to connect the rule to the data and decision in the question.

This matters because —an orbital is a region within an atom that can hold up to two electrons with opposite spins determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —an orbital is a region within an atom that can hold up to two electrons with opposite spins to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —An orbital is a region within an atom that can hold up to two electrons with opposite spins is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.