Definition, Meaning & Synonyms
formula-unit
noun
/ˈfɔːrmjʊlə ˈjuːnɪt/
Definition
The simplest whole number ratio of ions in an ionic compound.
Examples
- In sodium chloride, the formula unit is NaCl, indicating one sodium ion for every chloride ion.
- The formula unit of magnesium oxide is MgO, showing a 1:1 ratio of magnesium to oxygen.
- Copper(II) sulfate has a formula unit of CuSO₄, which includes one copper ion and one sulfate ion.
Meaning
A formula unit represents the lowest ratio of the different atoms or ions in a compound, used primarily for ionic compounds instead of molecules.
Synonyms
- chemical formula
- empirical formula
- structural formula
