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Writing Formulas for Ionic Compounds SPS 2b. Predict formulas for stable binary ionic compounds based on balance of charges. Name_______________________________________________Period_____Date______________ Name_______________________________________________ Using the tiles provided select the correct number of each ion to balance the charges for the ionic compound made for the identified elements. Once the correct numbers of tiles have been selected, write the chemical formula for that ionic compound. 1. Magnesium and chlorine Chemical Formula______________________ 2. Potassium and oxygen Chemical Formula______________________ 3. Beryllium and oxygen Chemical Formula______________________ 4. Sodium and selenium Chemical Formula______________________ 5. Calcium and fluorine Chemical Formula______________________ 6. Lithium and sulfur Chemical Formula______________________ 7. Aluminum and oxygen 8. Make three of your own with the remaining tiles Chemical Formula______________________ Chemical Formula________________ Mg Ca K 2+ 2+ 1+ 1+ Li 3+ Al Mg Ca K 2+ 2+ 1+ Li 1+ Al 3+ Be 2+ Be 2+ Na 1+ Na 1+ Al 3+ S 22- O 2- O 1- Cl 1- F S 2- O 2- O 2- Cl F 1- 1- Se 2- Se 2- O 21- Br 1- Br