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Final answer:The chemical symbol OO represents a double bond between two oxygen atoms in a molecule of oxygen gas, where they share two pairs of electrons for stability.Explanation:The chemical symbol OO means that the atoms are double bonded. This refers to the sharing of two pairs of electrons between two oxygen atoms to form molecular oxygen, O₂. Each oxygen atom has six electrons in its valence shell, and by sharing two pairs (four electrons total), they gain the electronic configuration of noble gases, which is a stable arrangement. The double bond is covalent, meaning it involves the sharing of electron pairs between atoms. This kind of bond is shorter and stronger than a single covalent bond....