Write the formula of a polyatomic cation
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For example, NO3− is the nitrate ion; it has one nitrogen atom and three oxygen atoms and an overall 1− charge. Table 5.5. 1 lists the most common polyatomic ions.
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Polyatomic Ions.
Name Formula
ammonium ion NH4+
acetate ion C2H3O2− (also written CH3CO2−)
carbonate ion CO32−
chromate ion CrO42
Explanation:
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Polyatomic Formulas - Polyatomic ions are made from more that one atom. This group of atoms act together as one unit with a single charge. Each of the polyatomic ions have a unique name. ... The formula for the compound will contain both a cation and an anion to balance the overall charge of the compound.
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