how to learn polyatomic ionic compound
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I think you should make some codes like a song out of it so that it becomes very easy to learn .. Trust me it will work...
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Rule 1. The cation is written first in the name; the anion is written second in the name. Rule 2. When the formula unit contains two or more of the same polyatomic ion, that ion is written in parentheses with the subscript written outside the parentheses
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