Chemical Formulas and Names of Ionic Compounds

4 Al, 6 O = 2:3 ratio. 6.) What is the relationship between the chemical formula for the compounds above and the ratio of the ions in them? The subscripts equal the ratio. 7.) What is the charge of a sodium ion? What is the charge of a chloride ion? Na+1 Cl-1 8.) What is the charge of the calcium ion? ................
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