Final answer:
Molecular compounds involve elements sharing electrons through covalent bonding to form discrete molecules, with SO₂ being an example in the given choices.
Explanation:
Molecular compounds are formed by elements that share electrons through covalent bonding to create discrete molecules. In the given choices, SO₂ would be considered a molecular compound as it consists of nonmetals bonding covalently to form molecules. In contrast, MgCl₂ and AlBr₃ are ionic compounds as they involve the transfer of electrons between metals and nonmetals to form ions.
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