4.10—The term ‘structural isomerism’

Understand the term ‘structural isomerism’ and be able to draw the structural isomers of organic molecules, given their molecular formula.

Use —the term ‘structural isomerism’ to connect the rule to the data and decision in the question.

This matters because —the term ‘structural isomerism’ determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the term ‘structural isomerism’ to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The term ‘structural isomerism’ is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.