GRADE 9 SCIENCE

Determining the Number of Atoms in Ionic Compound Formulas. The ionic charges must balance in ionic compounds. Some periodic tables have the ionic charges included (see example boxes below). If you have a +1 metal, you must have a -1 non-metal. If you have a +3 metal, you can have one -3 non-metal or three -1 non-metals. ................
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