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

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

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Answer 1 · 2016-11-28T16:14:50

That there is only the one such atom in the formula unit.

Explanation:

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

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

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

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