What does the suffix -ide mean, and which element in the name of a binary ionic compound gets it?

The suffix "-ide" in chemistry typically indicates a binary compound formed between two elements, where the more electronegative element (usually a non-metal) receives the "-ide" suffix. A binary compound is a chemical compound composed of exactly two different elements.

In a binary ionic compound, the element that gets the -ide suffix is usually the more electronegative element (a non-metal).

Here are a few examples of binary ionic compounds that use the "-ide" suffix to help clarify which element gets the suffix: - Sodium chloride (NaCl): In this compound, sodium (Na) is a metal, and chlorine (Cl) is a non-metal. Chlorine is more electronegative than sodium and thus gets the -ide suffix, forming "chloride." - Calcium fluoride (CaF₂): Calcium (Ca) is a metal, and fluorine (F) is a non-metal. Fluorine is more electronegative than calcium, so it gets the -ide suffix, forming "fluoride." - Aluminum oxide (Al₂O₃): Aluminum (Al) is a metal, and oxygen (O) is a non-metal. Oxygen is more electronegative than aluminum, so it gets the -ide suffix, forming "oxide." In summary, the suffix -ide indicates a binary compound formed between two elements, and the more electronegative non-metallic element gets the -ide suffix in the name of binary ionic compounds.