Question

What are the empirical formulas for: calcium chloride, potassium oxide, magnesium sulfide, magnesium chloride, lithium fluoride, lithium oxide, sodium sulfide?

Answer 1

`"CaCl"_2`
`"K"_2"O"`
`"MgS"`
`"MgCl"_2`
`"LiF"`
`"Li"_2"O"`
`"Na"_2"S"`

Explanation:

Magnesium, Potassium, Lithium, and Sodium all have an oxidation state of `+1`. Calcium has `+2`. Oxygen and Sulfur have an oxidation state of `-2`. Fluorine and Chlorine have an oxidation state of `-1`.