How are these two suffixes different?

How is the meaning of phosphate different from phosphide in compound naming?

Answer #1

phosphide is any of a class of chemical compounds in which phosphorus is combined with a metal. Phosphate is any of numerous chemical compounds related to phosphoric acid (H3PO4).

Answer #2

-Ide is the suffix given to monatomic anions -Ate is the suffix given to polyatomic ions

The monatomic anions are named by adding -ide to the root of the name of the nonmetal that forms the anion.

A Polyatomic Ion is composed of two or more atoms covalently bonded or of a metal complex that can be considered as acting as a single unit in the context of acid and base chemistry or in the formation of salts

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