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Naming Ionic (Binary) Compounds 1.Cation name first 2.Anion name second…..but a.Take off the normal anion name ending b.Add –ide instead Na and Cl K and Br Mg and I Ca and P

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Writing Formulas for Ionic Compounds Follow these steps: 1. What is the name of the compound? 2. List the symbols and charges for the cation and anion. 3. Determine the ratio of ions in the compound. All compounds are NEUTRAL so the total charges on the cations and anions must add up to ZERO! 4. Write the formula. Cation symbol 1 st Anion symbol 2 nd Use subscripts to show the ratio of the ions in the compound. 5. Is your answer reasonable? Does it make sense? Check your work.

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What is the formula for calcium chloride? 1. What is the name of the compound? 2. List the symbols and charges for the cation and anion. 3. Determine the ratio of ions in the compound. All compounds are NEUTRAL so the total charges on the cations and anions must add up to ZERO! 4. Write the formula. Cation symbol 1 st Anion symbol 2 nd Use subscripts to show the ratio of the ions in the compound. 5. Is your answer reasonable? Does it make sense? Check your work.

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What is the formula for calcium oxide? 1. What is the name of the compound? 2. List the symbols and charges for the cation and anion. 3. Determine the ratio of ions in the compound. All compounds are NEUTRAL so the total charges on the cations and anions must add up to ZERO! 4. Write the formula. Cation symbol 1 st Anion symbol 2 nd Use subscripts to show the ratio of the ions in the compound. 5. Is your answer reasonable? Does it make sense? Check your work.

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What is the formula for copper (I) sulfide? 1. What is the name of the compound? 2. List the symbols and charges for the cation and anion. 3. Determine the ratio of ions in the compound. All compounds are NEUTRAL so the total charges on the cations and anions must add up to ZERO! 4. Write the formula. Cation symbol 1 st Anion symbol 2 nd Use subscripts to show the ratio of the ions in the compound. 5. Is your answer reasonable? Does it make sense? Check your work.

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What is the formula for aluminum sulfide? 1. What is the name of the compound? 2. List the symbols and charges for the cation and anion. 3. Determine the ratio of ions in the compound. All compounds are NEUTRAL so the total charges on the cations and anions must add up to ZERO! 4. Write the formula. Cation symbol 1 st Anion symbol 2 nd Use subscripts to show the ratio of the ions in the compound. 5. Is your answer reasonable? Does it make sense? Check your work.

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What is the formula for potassium nitride? 1. What is the name of the compound? 2. List the symbols and charges for the cation and anion. 3. Determine the ratio of ions in the compound. All compounds are NEUTRAL so the total charges on the cations and anions must add up to ZERO! 4. Write the formula. Cation symbol 1 st Anion symbol 2 nd Use subscripts to show the ratio of the ions in the compound. 5. Is your answer reasonable? Does it make sense? Check your work.

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