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Things to Know about Ionic Compounds Each ionic compound has a positive ion and a negative ion. MetalNon-metal The name of the negative non-metal ion always ends in –ide. FF FluorineFluoride Li F + - cation anion ChlorideCl - BromideBr - IodideI - OxideO 2- SulfideS 2- SelenideSe 2- NitrideN 3- PhosphideP 3- Metalloids can also act like non-metals -ArsenideAs 3- -TellurideTe 2-