Answer:
D. Chromate:CrO4^2- ; dichromate: Cr2O7^2-
d. chromate: CrO₄²⁻ ; dichromate: Cr₂O₇²⁻
Step-by-step explanation:
A polyatomic ion is a charged ion that contains more than one atom covalently bonded or of metal complex acting as a single uit. It is also known as a molecular ion
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