"A formula that shows the kinds and numbers of atoms in the smallest representative unit of a substance"

While a formula unit is described as :

The lowest whole number ratio of ions in an ionic compound. Thus the formula unit for sodium chloride is NaCl.

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Though the definitions seem to differ, the written formulas appear identical. A chemical formula appears to be another way to represent a formula unit. For example, NaCl is both the chemical formula and formula unit for Sodium Chloride. Is there ever a difference between the written terms?

ionic-compounds terminology
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edited Jan 11 "17 at 14:39
Ciambro
asked Jan 9 "17 at 19:13

CiambroCiambro
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