1. Polyatomic ions

2. What are polyatomic ions? – ions that are made of more than one atom

3. Polyatomic ions What are polyatomic ions?

4. Polyatomic ions,

5. How Do We Write Chemical Names for Polyatomic Ions? Use the same steps you use for all the other ions. EXCEPT YOU DON’T NEED THE “IDE” ENDING Ion 1 (-) Ion 2(-) BracketsNameChemical formula Na + PO 4 3- Fe 2+ NO 3 -

6. How Do We Write Chemical Names for Polyatomic Ions? Use the same steps you use for all the other ions. EXCEPT YOU DON’T NEED THE “IDE” ENDING Ion 1 (-) Ion 2(-) BracketsNameChemical formula Na + PO 4 3- no Fe 2+ NO 2 -

7. How Do We Write Chemical Names for Polyatomic Ions? Use the same steps you use for all the other ions. EXCEPT YOU DON’T NEED THE “IDE” ENDING Ion 1 (-) Ion 2(-) BracketsNameChemical formula Na + PO 4 3- noSodium phosphate Fe 2+ NO 2 -

8. How Do We Write Chemical Names for Polyatomic Ions? Use the same steps you use for all the other ions. EXCEPT YOU DON’T NEED THE “IDE” ENDING Ion 1 (-) Ion 2(-) BracketsNameChemical formula Na + PO 4 3- noSodium phosphateNa 3 PO 4 Fe 2+ NO 2 -

9. How Do We Write Chemical Names for Polyatomic Ions? Use the same steps you use for all the other ions. EXCEPT YOU DON’T NEED THE “IDE” ENDING Ion 1 (-) Ion 2(-) BracketsNameChemical formula Na + PO 4 3- noSodium phosphateNa 3 PO 4 Fe 2+ NO 2 - yes

10. How Do We Write Chemical Names for Polyatomic Ions? Use the same steps you use for all the other ions. EXCEPT YOU DON’T NEED THE “IDE” ENDING Ion 1 (-) Ion 2(-) BracketsNameChemical formula Na + PO 4 3- noSodium phosphateNa 3 PO 4 Fe 2+ NO 2 - yesIron (II) nitrite

11. How Do We Write Chemical Names for Polyatomic Ions? Use the same steps you use for all the other ions. EXCEPT YOU DON’T NEED THE “IDE” ENDING Ion 1 (-) Ion 2(-) BracketsNameChemical formula Na + PO 4 3- noSodium phosphateNa 3 PO 4 Fe 2+ NO 2 - yesIron (II) nitriteFe(NO 2 ) 2