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

So we take a common ionic material such as calcium fluoride, $C a {F}_{2}$. In one formula unit there is the one $C {a}^{2 +}$ ion, and $2 \times {F}^{-}$ ions.
In one mole of calcium fluoride, there are one mole of $C {a}^{2 +}$ ions, and two moles of ${F}^{-}$ ions. How many moles of ions (calcium and fluoride) are in one mole of $C a {F}_{2}$?