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A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are typically shared between two nonmetallic atoms, although covalent bonds can also form between a metal and a nonmetal. Covalent bonds are formed when the valence orbitals of the participating atoms overlap, resulting in the formation of a molecular orbital that contains the shared electrons. The strength of a covalent bond is determined by the number of shared electron pairs, with double and triple bonds being stronger than single bonds. Covalent bonds are typically found in molecular compounds, such as water, carbon dioxide, and methane.