Hint for Writing the Formula for Potassium perchlorate Potassium perchlorate --- a metal (Potassium) and then a polyatomic ion (when you see a name ending in ate it is likely an ion).
- Write the element symbol and ionic charge for Potassium.
- Look up the name and charge for perchlorate on the Common Ion Table
- Balance the charges so the total charge on the compound is zero.
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