🧪 SET 4: Writing Ionic Formulas
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10 Terms
What must be true about the total charge in an ionic compound?
It must equal zero
What is the first step in writing ionic formulas?
Identify elements and charges
What determines ion charge?
The element’s group on the periodic table
What is the second step in writing ionic formulas?
Balance charges
What is the final step in writing ionic formulas?
Write subscripts with no charges
Why are charges not written in final formulas?
The compound is neutral overall
What is the criss-cross method?
Using charges as subscripts for the opposite ion
What must you do after criss-crossing?
Reduce to simplest ratio
What is a common mistake in ionic formulas?
Writing subscripts of 1
What is another common mistake?
Not reducing ratios
