Based on the definition of the formula unit, the only one that is an example of this concept is NaCl.
In chemistry, this concept refers to the representation of an ionic compound. This formula differs from others because it displays the lowest possible ratio in which the ions have the same charges and therefore the compound is neutral.
A classical example of this concept is NaCl because this includes a cation (positively charged) and an anion (negatively charged). Moreover, in this formula, the compound shows the lowest possible ratio between the two elements.
Learn more about compounds in: https://brainly.com/question/13516179
