A chemical compound formed when a halogen element combines with another element or radical; salts like sodium chloride (table salt).
From 'hal-' (relating to salt, from Greek 'hals') and '-ide' (indicating a binary compound). Coined in modern chemistry to describe salt-forming reactions.
Every halide you encounter is part of an ancient pattern—halogens 'want' to form salts so badly that they're among the most reactive elements on the periodic table, which is why chemistry teachers use them to demonstrate reactions!
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