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| having an unsymmetrical arrangement of atoms in a molecule, or noting a carbon atom bonded to four different atoms or groups |
| the molecular weight of a substance expressed in grams; a gram molecule |
| chelation (kĭ-lā'shən) Pronunciation Key
The combination of a metal ion with a chemical compound to form a ring. Chelation is used in the industrial separation and extraction of metals and to treat metal poisoning. |