FORMULA WEIGHT


Meaning of FORMULA WEIGHT in English

Sum of the atomic weight s of all atom s in a chemical formula.

The term is generally applied to a substance that consists of ions (see ionic bond ) rather than individual molecules (and thus does not have a molecular weight ). An example of such a substance is sodium chloride (table salt). Such a substance's chemical formula describes the simplest ratio of the number of atoms of the constituent element s. See also stoichiometry .

Britannica English dictionary.      Английский словарь Британика.