A molecule composed of two halogen atoms bonded together, like chlorine gas (Cl₂).
From 'di-' (two) combined with 'halogen,' which comes from Greek 'hals' (salt) and 'gen' (producing).
Dihalogenes like chlorine gas (Cl₂) and bromine vapor (Br₂) are deadly poisons, but they're also essential for water purification and industrial chemistry—a perfect example of chemistry's double edge.
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