Covalent ____ is a shared pair of ____ between two ____ elements. Covalent bond is a ____ pair of electrons between ____ nonmetal ____. ____ bond is a ____ ____ of electrons between ____ ____ elements. ____ ____ is a ____ pair of ____ between two ____ elements. ____ ____ is a ____ ____ of ____ ____ ____ ____ ____.

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