When a chemical symbol in a chemical formula has no subscript, what does it mean?

Md Ariful Islam

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Md Ariful Islam

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So we take a common ionic material such as calcium fluoride, $CaF_2$. In one formula unit there is the one $Ca^(2+)$ ion, and $2xxF^-$ ions.

In one mole of calcium fluoride, there are one mole of $Ca^(2+)$ ions, and two moles of $F^-$ ions. How many moles of ions (calcium and fluoride) are in one mole of $CaF_2$?

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