A chemical compound formed when arsenic combines with a metal or other element, similar to how sulfur compounds are called sulfides.
From 'arsenic' (Persian 'zarnik' through Greek and Latin) plus the suffix '-ide' (from 'sulfide'), standardized in chemistry nomenclature in the 19th century.
The '-ide' suffix revolutionized chemistry—by using consistent endings like in 'arsenide,' 'sulfide,' and 'chloride,' chemists created a universal naming system that lets you recognize compound types across all languages.
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