Cambridge IGCSE Chemistry · Syllabus 0620 · Stoichiometry
Empirical formula
What is Empirical formula?
The empirical formula of a compound is the simplest whole-number ratio of the different atoms or ions present in that compound, for example CH2 for ethene, whose molecular formula is C2H4.
This definition is part of the Stoichiometry chapter in Cambridge IGCSE Chemistry.