write chemical formula and name all ionic compounds
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Polyatomic ions have characteristic formulas, names, and charges that should be memorized. For example, NO3− is the nitrate ion; it has one nitrogen atom and three oxygen atoms and an overall 1− charge.
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Polyatomic Ions.
Name Formula
cyanide ion CN−
hydroxide ion OH−
nitrate ion NO3−
nitrite ion NO2−
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